[
  {
    "psig_desc": [
      "Psig_attribute",
      {
        "attr_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "_none_",
              "pos_lnum": 0,
              "pos_bol": 0,
              "pos_cnum": -1
            },
            "loc_end": {
              "pos_fname": "_none_",
              "pos_lnum": 0,
              "pos_bol": 0,
              "pos_cnum": -1
            },
            "loc_ghost": true
          },
          "txt2": "ocaml.text"
        },
        "attr_payload": [
          "PStr",
          [
            {
              "pstr_desc": [
                "Pstr_eval",
                {
                  "pexp_desc": [
                    "Pexp_constant",
                    [
                      "Pconst_string",
                      " A low-level, mutable AVL tree.\n\n    It is not intended to be used directly by casual users. It is used for implementing\n    other data structures. The interface is somewhat ugly, and it's that way for a\n    reason: the goal of this module is minimum memory overhead and maximum performance.\n\n    {2 Caveats}\n\n    1. [compare] is passed to every function where it is used. If you pass a different\n    [compare] to functions on the same tree, then behavior is indeterminate. Why? Because\n    otherwise we'd need a top-level record to store [compare], and when building a hash\n    table, or other structure, that little [t] is a block that increases memory\n    overhead. However, if an empty tree is just a constructor [Empty], then it's just a\n    number, and uses no extra memory beyond the array bucket that holds it. That's the\n    first secret of how Hashtbl's memory overhead isn't higher than INRIA's, even though\n    it uses a tree instead of a list for buckets.\n\n    2. But if it's mutable, why do all the \"mutators\" return [t]? Answer: it is mutable,\n    but the root node might change due to balancing. Since we have no top-level record to\n    hold the current root node (see point 1), you have to do it. If you fail to do it, and\n    use an old root node, you're responsible for the (sure to be nasty) consequences.\n\n    3. What on earth is up with the [~removed] argument to some functions? See point 1:\n    since there is no top-level node, it isn't possible to keep track of how many nodes\n    are in the tree unless each mutator tells you whether or not it added or removed a\n    node (vs. replacing an existing one). If you intend to keep a count (as you must in a\n    hash table), then you will need to pay attention to this flag.\n\n    After all this, you're probably asking yourself whether all these hacks are worth\n    it. Yes! They are! With them, we built a hash table that is faster than INRIA's (no\n    small feat) with the same memory overhead, sane add semantics (the add semantics they\n    used were a performance hack), and worst-case log(N) insertion, lookup, and\n    removal. ",
                      {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 1,
                          "pos_bol": 0,
                          "pos_cnum": 0
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 33,
                          "pos_bol": 2095,
                          "pos_cnum": 2110
                        },
                        "loc_ghost": false
                      },
                      null
                    ]
                  ],
                  "pexp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 1,
                      "pos_bol": 0,
                      "pos_cnum": 0
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 33,
                      "pos_bol": 2095,
                      "pos_cnum": 2110
                    },
                    "loc_ghost": false
                  },
                  "pexp_loc_stack": [],
                  "pexp_attributes": []
                },
                []
              ],
              "pstr_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 1,
                  "pos_bol": 0,
                  "pos_cnum": 0
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 33,
                  "pos_bol": 2095,
                  "pos_cnum": 2110
                },
                "loc_ghost": false
              }
            }
          ]
        ],
        "attr_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 1,
            "pos_bol": 0,
            "pos_cnum": 0
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 33,
            "pos_bol": 2095,
            "pos_cnum": 2110
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 1,
        "pos_bol": 0,
        "pos_cnum": 0
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 33,
        "pos_bol": 2095,
        "pos_cnum": 2110
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_open",
      {
        "popen_expr": "Import",
        "popen_override": "Override",
        "popen_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 35,
            "pos_bol": 2112,
            "pos_cnum": 2112
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 35,
            "pos_bol": 2112,
            "pos_cnum": 2124
          },
          "loc_ghost": false
        },
        "popen_attributes": []
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 35,
        "pos_bol": 2112,
        "pos_cnum": 2112
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 35,
        "pos_bol": 2112,
        "pos_cnum": 2124
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_type",
      [ "Recursive" ],
      [
        {
          "ptype_name": {
            "loc2": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 40,
                "pos_bol": 2340,
                "pos_cnum": 2354
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 40,
                "pos_bol": 2340,
                "pos_cnum": 2355
              },
              "loc_ghost": false
            },
            "txt2": "t"
          },
          "ptype_params": [
            [
              {
                "ptyp_desc": [ "Ptyp_var", "k" ],
                "ptyp_loc": {
                  "loc_start": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 40,
                    "pos_bol": 2340,
                    "pos_cnum": 2346
                  },
                  "loc_end": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 40,
                    "pos_bol": 2340,
                    "pos_cnum": 2348
                  },
                  "loc_ghost": false
                },
                "ptyp_loc_stack": [],
                "ptyp_attributes": []
              },
              [ [ "NoVariance" ], [ "NoInjectivity" ] ]
            ],
            [
              {
                "ptyp_desc": [ "Ptyp_var", "v" ],
                "ptyp_loc": {
                  "loc_start": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 40,
                    "pos_bol": 2340,
                    "pos_cnum": 2350
                  },
                  "loc_end": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 40,
                    "pos_bol": 2340,
                    "pos_cnum": 2352
                  },
                  "loc_ghost": false
                },
                "ptyp_loc_stack": [],
                "ptyp_attributes": []
              },
              [ [ "NoVariance" ], [ "NoInjectivity" ] ]
            ]
          ],
          "ptype_cstrs": [],
          "ptype_kind": [
            "Ptype_variant",
            [
              {
                "pcd_name": {
                  "loc2": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 41,
                      "pos_bol": 2366,
                      "pos_cnum": 2370
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 41,
                      "pos_bol": 2366,
                      "pos_cnum": 2375
                    },
                    "loc_ghost": false
                  },
                  "txt2": "Empty"
                },
                "pcd_vars": [],
                "pcd_args": [ "Pcstr_tuple", [] ],
                "pcd_res": null,
                "pcd_loc": {
                  "loc_start": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 41,
                    "pos_bol": 2366,
                    "pos_cnum": 2368
                  },
                  "loc_end": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 41,
                    "pos_bol": 2366,
                    "pos_cnum": 2375
                  },
                  "loc_ghost": false
                },
                "pcd_attributes": []
              },
              {
                "pcd_name": {
                  "loc2": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 42,
                      "pos_bol": 2376,
                      "pos_cnum": 2380
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 42,
                      "pos_bol": 2376,
                      "pos_cnum": 2384
                    },
                    "loc_ghost": false
                  },
                  "txt2": "Node"
                },
                "pcd_vars": [],
                "pcd_args": [
                  "Pcstr_record",
                  [
                    {
                      "pld_name": {
                        "loc2": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 43,
                            "pos_bol": 2388,
                            "pos_cnum": 2404
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 43,
                            "pos_bol": 2388,
                            "pos_cnum": 2408
                          },
                          "loc_ghost": false
                        },
                        "txt2": "left"
                      },
                      "pld_mutable": [ "Mutable" ],
                      "pld_type": {
                        "ptyp_desc": [
                          "Ptyp_constr",
                          "t",
                          [
                            {
                              "ptyp_desc": [ "Ptyp_var", "k" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 43,
                                  "pos_bol": 2388,
                                  "pos_cnum": 2412
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 43,
                                  "pos_bol": 2388,
                                  "pos_cnum": 2414
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [ "Ptyp_var", "v" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 43,
                                  "pos_bol": 2388,
                                  "pos_cnum": 2416
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 43,
                                  "pos_bol": 2388,
                                  "pos_cnum": 2418
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ]
                        ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 43,
                            "pos_bol": 2388,
                            "pos_cnum": 2411
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 43,
                            "pos_bol": 2388,
                            "pos_cnum": 2421
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      },
                      "pld_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 43,
                          "pos_bol": 2388,
                          "pos_cnum": 2396
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 44,
                          "pos_bol": 2422,
                          "pos_cnum": 2429
                        },
                        "loc_ghost": false
                      },
                      "pld_attributes": []
                    },
                    {
                      "pld_name": {
                        "loc2": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 44,
                            "pos_bol": 2422,
                            "pos_cnum": 2430
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 44,
                            "pos_bol": 2422,
                            "pos_cnum": 2433
                          },
                          "loc_ghost": false
                        },
                        "txt2": "key"
                      },
                      "pld_mutable": [ "Immutable" ],
                      "pld_type": {
                        "ptyp_desc": [ "Ptyp_var", "k" ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 44,
                            "pos_bol": 2422,
                            "pos_cnum": 2436
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 44,
                            "pos_bol": 2422,
                            "pos_cnum": 2438
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      },
                      "pld_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 44,
                          "pos_bol": 2422,
                          "pos_cnum": 2430
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 45,
                          "pos_bol": 2439,
                          "pos_cnum": 2446
                        },
                        "loc_ghost": false
                      },
                      "pld_attributes": []
                    },
                    {
                      "pld_name": {
                        "loc2": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 45,
                            "pos_bol": 2439,
                            "pos_cnum": 2455
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 45,
                            "pos_bol": 2439,
                            "pos_cnum": 2460
                          },
                          "loc_ghost": false
                        },
                        "txt2": "value"
                      },
                      "pld_mutable": [ "Mutable" ],
                      "pld_type": {
                        "ptyp_desc": [ "Ptyp_var", "v" ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 45,
                            "pos_bol": 2439,
                            "pos_cnum": 2463
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 45,
                            "pos_bol": 2439,
                            "pos_cnum": 2465
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      },
                      "pld_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 45,
                          "pos_bol": 2439,
                          "pos_cnum": 2447
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 46,
                          "pos_bol": 2466,
                          "pos_cnum": 2473
                        },
                        "loc_ghost": false
                      },
                      "pld_attributes": []
                    },
                    {
                      "pld_name": {
                        "loc2": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 46,
                            "pos_bol": 2466,
                            "pos_cnum": 2482
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 46,
                            "pos_bol": 2466,
                            "pos_cnum": 2488
                          },
                          "loc_ghost": false
                        },
                        "txt2": "height"
                      },
                      "pld_mutable": [ "Mutable" ],
                      "pld_type": {
                        "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 46,
                            "pos_bol": 2466,
                            "pos_cnum": 2491
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 46,
                            "pos_bol": 2466,
                            "pos_cnum": 2494
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      },
                      "pld_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 46,
                          "pos_bol": 2466,
                          "pos_cnum": 2474
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 47,
                          "pos_bol": 2495,
                          "pos_cnum": 2502
                        },
                        "loc_ghost": false
                      },
                      "pld_attributes": []
                    },
                    {
                      "pld_name": {
                        "loc2": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 47,
                            "pos_bol": 2495,
                            "pos_cnum": 2511
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 47,
                            "pos_bol": 2495,
                            "pos_cnum": 2516
                          },
                          "loc_ghost": false
                        },
                        "txt2": "right"
                      },
                      "pld_mutable": [ "Mutable" ],
                      "pld_type": {
                        "ptyp_desc": [
                          "Ptyp_constr",
                          "t",
                          [
                            {
                              "ptyp_desc": [ "Ptyp_var", "k" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 47,
                                  "pos_bol": 2495,
                                  "pos_cnum": 2520
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 47,
                                  "pos_bol": 2495,
                                  "pos_cnum": 2522
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [ "Ptyp_var", "v" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 47,
                                  "pos_bol": 2495,
                                  "pos_cnum": 2524
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 47,
                                  "pos_bol": 2495,
                                  "pos_cnum": 2526
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ]
                        ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 47,
                            "pos_bol": 2495,
                            "pos_cnum": 2519
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 47,
                            "pos_bol": 2495,
                            "pos_cnum": 2529
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      },
                      "pld_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 47,
                          "pos_bol": 2495,
                          "pos_cnum": 2503
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 47,
                          "pos_bol": 2495,
                          "pos_cnum": 2529
                        },
                        "loc_ghost": false
                      },
                      "pld_attributes": []
                    }
                  ]
                ],
                "pcd_res": null,
                "pcd_loc": {
                  "loc_start": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 42,
                    "pos_bol": 2376,
                    "pos_cnum": 2378
                  },
                  "loc_end": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 48,
                    "pos_bol": 2530,
                    "pos_cnum": 2537
                  },
                  "loc_ghost": false
                },
                "pcd_attributes": []
              },
              {
                "pcd_name": {
                  "loc2": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 49,
                      "pos_bol": 2538,
                      "pos_cnum": 2542
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 49,
                      "pos_bol": 2538,
                      "pos_cnum": 2546
                    },
                    "loc_ghost": false
                  },
                  "txt2": "Leaf"
                },
                "pcd_vars": [],
                "pcd_args": [
                  "Pcstr_record",
                  [
                    {
                      "pld_name": {
                        "loc2": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 50,
                            "pos_bol": 2550,
                            "pos_cnum": 2558
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 50,
                            "pos_bol": 2550,
                            "pos_cnum": 2561
                          },
                          "loc_ghost": false
                        },
                        "txt2": "key"
                      },
                      "pld_mutable": [ "Immutable" ],
                      "pld_type": {
                        "ptyp_desc": [ "Ptyp_var", "k" ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 50,
                            "pos_bol": 2550,
                            "pos_cnum": 2564
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 50,
                            "pos_bol": 2550,
                            "pos_cnum": 2566
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      },
                      "pld_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 50,
                          "pos_bol": 2550,
                          "pos_cnum": 2558
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 51,
                          "pos_bol": 2567,
                          "pos_cnum": 2574
                        },
                        "loc_ghost": false
                      },
                      "pld_attributes": []
                    },
                    {
                      "pld_name": {
                        "loc2": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 51,
                            "pos_bol": 2567,
                            "pos_cnum": 2583
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 51,
                            "pos_bol": 2567,
                            "pos_cnum": 2588
                          },
                          "loc_ghost": false
                        },
                        "txt2": "value"
                      },
                      "pld_mutable": [ "Mutable" ],
                      "pld_type": {
                        "ptyp_desc": [ "Ptyp_var", "v" ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 51,
                            "pos_bol": 2567,
                            "pos_cnum": 2591
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 51,
                            "pos_bol": 2567,
                            "pos_cnum": 2593
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      },
                      "pld_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 51,
                          "pos_bol": 2567,
                          "pos_cnum": 2575
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 51,
                          "pos_bol": 2567,
                          "pos_cnum": 2593
                        },
                        "loc_ghost": false
                      },
                      "pld_attributes": []
                    }
                  ]
                ],
                "pcd_res": null,
                "pcd_loc": {
                  "loc_start": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 49,
                    "pos_bol": 2538,
                    "pos_cnum": 2540
                  },
                  "loc_end": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 52,
                    "pos_bol": 2594,
                    "pos_cnum": 2601
                  },
                  "loc_ghost": false
                },
                "pcd_attributes": []
              }
            ]
          ],
          "ptype_private": [ "Private" ],
          "ptype_manifest": null,
          "ptype_attributes": [
            {
              "attr_name": {
                "loc2": {
                  "loc_start": {
                    "pos_fname": "_none_",
                    "pos_lnum": 0,
                    "pos_bol": 0,
                    "pos_cnum": -1
                  },
                  "loc_end": {
                    "pos_fname": "_none_",
                    "pos_lnum": 0,
                    "pos_bol": 0,
                    "pos_cnum": -1
                  },
                  "loc_ghost": true
                },
                "txt2": "ocaml.doc"
              },
              "attr_payload": [
                "PStr",
                [
                  {
                    "pstr_desc": [
                      "Pstr_eval",
                      {
                        "pexp_desc": [
                          "Pexp_constant",
                          [
                            "Pconst_string",
                            " We expose [t] to allow an optimization in Hashtbl that makes iter and fold more than\n    twice as fast.  We keep the type private to reduce opportunities for external code to\n    violate avltree invariants. ",
                            {
                              "loc_start": {
                                "pos_fname": "./_opam/lib/base/avltree.mli",
                                "pos_lnum": 37,
                                "pos_bol": 2126,
                                "pos_cnum": 2126
                              },
                              "loc_end": {
                                "pos_fname": "./_opam/lib/base/avltree.mli",
                                "pos_lnum": 39,
                                "pos_bol": 2305,
                                "pos_cnum": 2339
                              },
                              "loc_ghost": false
                            },
                            null
                          ]
                        ],
                        "pexp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 37,
                            "pos_bol": 2126,
                            "pos_cnum": 2126
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 39,
                            "pos_bol": 2305,
                            "pos_cnum": 2339
                          },
                          "loc_ghost": false
                        },
                        "pexp_loc_stack": [],
                        "pexp_attributes": []
                      },
                      []
                    ],
                    "pstr_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 37,
                        "pos_bol": 2126,
                        "pos_cnum": 2126
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 39,
                        "pos_bol": 2305,
                        "pos_cnum": 2339
                      },
                      "loc_ghost": false
                    }
                  }
                ]
              ],
              "attr_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 37,
                  "pos_bol": 2126,
                  "pos_cnum": 2126
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 39,
                  "pos_bol": 2305,
                  "pos_cnum": 2339
                },
                "loc_ghost": false
              }
            }
          ],
          "ptype_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 40,
              "pos_bol": 2340,
              "pos_cnum": 2340
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 52,
              "pos_bol": 2594,
              "pos_cnum": 2601
            },
            "loc_ghost": false
          }
        }
      ]
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 40,
        "pos_bol": 2340,
        "pos_cnum": 2340
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 52,
        "pos_bol": 2594,
        "pos_cnum": 2601
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 54,
              "pos_bol": 2603,
              "pos_cnum": 2607
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 54,
              "pos_bol": 2603,
              "pos_cnum": 2612
            },
            "loc_ghost": false
          },
          "txt2": "empty"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_constr",
            "t",
            [
              {
                "ptyp_desc": [ "Ptyp_var", "k" ],
                "ptyp_loc": {
                  "loc_start": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 54,
                    "pos_bol": 2603,
                    "pos_cnum": 2616
                  },
                  "loc_end": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 54,
                    "pos_bol": 2603,
                    "pos_cnum": 2618
                  },
                  "loc_ghost": false
                },
                "ptyp_loc_stack": [],
                "ptyp_attributes": []
              },
              {
                "ptyp_desc": [ "Ptyp_var", "v" ],
                "ptyp_loc": {
                  "loc_start": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 54,
                    "pos_bol": 2603,
                    "pos_cnum": 2620
                  },
                  "loc_end": {
                    "pos_fname": "./_opam/lib/base/avltree.mli",
                    "pos_lnum": 54,
                    "pos_bol": 2603,
                    "pos_cnum": 2622
                  },
                  "loc_ghost": false
                },
                "ptyp_loc_stack": [],
                "ptyp_attributes": []
              }
            ]
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 54,
              "pos_bol": 2603,
              "pos_cnum": 2615
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 54,
              "pos_bol": 2603,
              "pos_cnum": 2625
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 54,
            "pos_bol": 2603,
            "pos_cnum": 2603
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 54,
            "pos_bol": 2603,
            "pos_cnum": 2625
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 54,
        "pos_bol": 2603,
        "pos_cnum": 2603
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 54,
        "pos_bol": 2603,
        "pos_cnum": 2625
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 55,
              "pos_bol": 2626,
              "pos_cnum": 2630
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 55,
              "pos_bol": 2626,
              "pos_cnum": 2638
            },
            "loc_ghost": false
          },
          "txt2": "is_empty"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_any" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 55,
                        "pos_bol": 2626,
                        "pos_cnum": 2641
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 55,
                        "pos_bol": 2626,
                        "pos_cnum": 2642
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 55,
                  "pos_bol": 2626,
                  "pos_cnum": 2641
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 55,
                  "pos_bol": 2626,
                  "pos_cnum": 2644
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [ "Ptyp_constr", "bool", [] ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 55,
                  "pos_bol": 2626,
                  "pos_cnum": 2648
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 55,
                  "pos_bol": 2626,
                  "pos_cnum": 2652
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 55,
              "pos_bol": 2626,
              "pos_cnum": 2641
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 55,
              "pos_bol": 2626,
              "pos_cnum": 2652
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 55,
            "pos_bol": 2626,
            "pos_cnum": 2626
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 55,
            "pos_bol": 2626,
            "pos_cnum": 2652
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 55,
        "pos_bol": 2626,
        "pos_cnum": 2626
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 55,
        "pos_bol": 2626,
        "pos_cnum": 2652
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 58,
              "pos_bol": 2725,
              "pos_cnum": 2729
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 58,
              "pos_bol": 2725,
              "pos_cnum": 2738
            },
            "loc_ghost": false
          },
          "txt2": "invariant"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 58,
                        "pos_bol": 2725,
                        "pos_cnum": 2742
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 58,
                        "pos_bol": 2725,
                        "pos_cnum": 2744
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 58,
                        "pos_bol": 2725,
                        "pos_cnum": 2746
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 58,
                        "pos_bol": 2725,
                        "pos_cnum": 2748
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 58,
                  "pos_bol": 2725,
                  "pos_cnum": 2741
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 58,
                  "pos_bol": 2725,
                  "pos_cnum": 2751
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 58,
                          "pos_bol": 2725,
                          "pos_cnum": 2764
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 58,
                          "pos_bol": 2725,
                          "pos_cnum": 2766
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 58,
                              "pos_bol": 2725,
                              "pos_cnum": 2770
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 58,
                              "pos_bol": 2725,
                              "pos_cnum": 2772
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 58,
                              "pos_bol": 2725,
                              "pos_cnum": 2776
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 58,
                              "pos_bol": 2725,
                              "pos_cnum": 2779
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 58,
                          "pos_bol": 2725,
                          "pos_cnum": 2770
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 58,
                          "pos_bol": 2725,
                          "pos_cnum": 2779
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 58,
                      "pos_bol": 2725,
                      "pos_cnum": 2764
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 58,
                      "pos_bol": 2725,
                      "pos_cnum": 2779
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [ "Ptyp_constr", "unit", [] ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 58,
                      "pos_bol": 2725,
                      "pos_cnum": 2784
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 58,
                      "pos_bol": 2725,
                      "pos_cnum": 2788
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 58,
                  "pos_bol": 2725,
                  "pos_cnum": 2755
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 58,
                  "pos_bol": 2725,
                  "pos_cnum": 2788
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 58,
              "pos_bol": 2725,
              "pos_cnum": 2741
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 58,
              "pos_bol": 2725,
              "pos_cnum": 2788
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " Checks invariants, raising an exception if any invariants fail. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 57,
                              "pos_bol": 2654,
                              "pos_cnum": 2654
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 57,
                              "pos_bol": 2654,
                              "pos_cnum": 2724
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 57,
                          "pos_bol": 2654,
                          "pos_cnum": 2654
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 57,
                          "pos_bol": 2654,
                          "pos_cnum": 2724
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 57,
                      "pos_bol": 2654,
                      "pos_cnum": 2654
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 57,
                      "pos_bol": 2654,
                      "pos_cnum": 2724
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 57,
                "pos_bol": 2654,
                "pos_cnum": 2654
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 57,
                "pos_bol": 2654,
                "pos_cnum": 2724
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 58,
            "pos_bol": 2725,
            "pos_cnum": 2725
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 58,
            "pos_bol": 2725,
            "pos_cnum": 2788
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 58,
        "pos_bol": 2725,
        "pos_cnum": 2725
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 58,
        "pos_bol": 2725,
        "pos_cnum": 2788
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 71,
              "pos_bol": 3476,
              "pos_cnum": 3480
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 71,
              "pos_bol": 3476,
              "pos_cnum": 3483
            },
            "loc_ghost": false
          },
          "txt2": "add"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 72,
                        "pos_bol": 3484,
                        "pos_cnum": 3490
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 72,
                        "pos_bol": 3484,
                        "pos_cnum": 3492
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 72,
                        "pos_bol": 3484,
                        "pos_cnum": 3494
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 72,
                        "pos_bol": 3484,
                        "pos_cnum": 3496
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 72,
                  "pos_bol": 3484,
                  "pos_cnum": 3489
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 72,
                  "pos_bol": 3484,
                  "pos_cnum": 3499
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "replace" ],
                {
                  "ptyp_desc": [ "Ptyp_constr", "bool", [] ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 73,
                      "pos_bol": 3500,
                      "pos_cnum": 3513
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 73,
                      "pos_bol": 3500,
                      "pos_cnum": 3517
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Labelled", "compare" ],
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 74,
                              "pos_bol": 3518,
                              "pos_cnum": 3532
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 74,
                              "pos_bol": 3518,
                              "pos_cnum": 3534
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Nolabel" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "k" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 74,
                                  "pos_bol": 3518,
                                  "pos_cnum": 3538
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 74,
                                  "pos_bol": 3518,
                                  "pos_cnum": 3540
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 74,
                                  "pos_bol": 3518,
                                  "pos_cnum": 3544
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 74,
                                  "pos_bol": 3518,
                                  "pos_cnum": 3547
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 74,
                              "pos_bol": 3518,
                              "pos_cnum": 3538
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 74,
                              "pos_bol": 3518,
                              "pos_cnum": 3547
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 74,
                          "pos_bol": 3518,
                          "pos_cnum": 3532
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 74,
                          "pos_bol": 3518,
                          "pos_cnum": 3547
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "added" ],
                        {
                          "ptyp_desc": [
                            "Ptyp_constr",
                            "ref",
                            [
                              {
                                "ptyp_desc": [ "Ptyp_constr", "bool", [] ],
                                "ptyp_loc": {
                                  "loc_start": {
                                    "pos_fname": "./_opam/lib/base/avltree.mli",
                                    "pos_lnum": 75,
                                    "pos_bol": 3549,
                                    "pos_cnum": 3560
                                  },
                                  "loc_end": {
                                    "pos_fname": "./_opam/lib/base/avltree.mli",
                                    "pos_lnum": 75,
                                    "pos_bol": 3549,
                                    "pos_cnum": 3564
                                  },
                                  "loc_ghost": false
                                },
                                "ptyp_loc_stack": [],
                                "ptyp_attributes": []
                              }
                            ]
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 75,
                              "pos_bol": 3549,
                              "pos_cnum": 3560
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 75,
                              "pos_bol": 3549,
                              "pos_cnum": 3568
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "key" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "k" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 76,
                                  "pos_bol": 3569,
                                  "pos_cnum": 3578
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 76,
                                  "pos_bol": 3569,
                                  "pos_cnum": 3580
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Labelled", "data" ],
                                {
                                  "ptyp_desc": [ "Ptyp_var", "v" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 77,
                                      "pos_bol": 3581,
                                      "pos_cnum": 3591
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 77,
                                      "pos_bol": 3581,
                                      "pos_cnum": 3593
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [
                                    "Ptyp_constr",
                                    "t",
                                    [
                                      {
                                        "ptyp_desc": [ "Ptyp_var", "k" ],
                                        "ptyp_loc": {
                                          "loc_start": {
                                            "pos_fname": "./_opam/lib/base/avltree.mli",
                                            "pos_lnum": 78,
                                            "pos_bol": 3594,
                                            "pos_cnum": 3600
                                          },
                                          "loc_end": {
                                            "pos_fname": "./_opam/lib/base/avltree.mli",
                                            "pos_lnum": 78,
                                            "pos_bol": 3594,
                                            "pos_cnum": 3602
                                          },
                                          "loc_ghost": false
                                        },
                                        "ptyp_loc_stack": [],
                                        "ptyp_attributes": []
                                      },
                                      {
                                        "ptyp_desc": [ "Ptyp_var", "v" ],
                                        "ptyp_loc": {
                                          "loc_start": {
                                            "pos_fname": "./_opam/lib/base/avltree.mli",
                                            "pos_lnum": 78,
                                            "pos_bol": 3594,
                                            "pos_cnum": 3604
                                          },
                                          "loc_end": {
                                            "pos_fname": "./_opam/lib/base/avltree.mli",
                                            "pos_lnum": 78,
                                            "pos_bol": 3594,
                                            "pos_cnum": 3606
                                          },
                                          "loc_ghost": false
                                        },
                                        "ptyp_loc_stack": [],
                                        "ptyp_attributes": []
                                      }
                                    ]
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 78,
                                      "pos_bol": 3594,
                                      "pos_cnum": 3599
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 78,
                                      "pos_bol": 3594,
                                      "pos_cnum": 3609
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 77,
                                  "pos_bol": 3581,
                                  "pos_cnum": 3586
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 78,
                                  "pos_bol": 3594,
                                  "pos_cnum": 3609
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 76,
                              "pos_bol": 3569,
                              "pos_cnum": 3574
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 78,
                              "pos_bol": 3594,
                              "pos_cnum": 3609
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 75,
                          "pos_bol": 3549,
                          "pos_cnum": 3554
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 78,
                          "pos_bol": 3594,
                          "pos_cnum": 3609
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 74,
                      "pos_bol": 3518,
                      "pos_cnum": 3523
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 78,
                      "pos_bol": 3594,
                      "pos_cnum": 3609
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 73,
                  "pos_bol": 3500,
                  "pos_cnum": 3505
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 78,
                  "pos_bol": 3594,
                  "pos_cnum": 3609
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 72,
              "pos_bol": 3484,
              "pos_cnum": 3489
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 78,
              "pos_bol": 3594,
              "pos_cnum": 3609
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " Adds the specified key and data to the tree destructively (previous [t]'s are no\n    longer valid) using the specified comparison function. O(log(N)) time, O(1) space.\n\n    The returned [t] is the new root node of the tree, and should be used on all further\n    calls to any other function in this module. The bool [ref], added, will be set to\n    [true] if a new node is added to the tree, or [false] if an existing node is replaced\n    (in the case that the key already exists).\n\n    If [replace] (default true) is true then [add] will overwrite any existing mapping for\n    [key]. If [replace] is false, and there is an existing mapping for key, then [add] has\n    no effect. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 60,
                              "pos_bol": 2790,
                              "pos_cnum": 2790
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 70,
                              "pos_bol": 3458,
                              "pos_cnum": 3475
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 60,
                          "pos_bol": 2790,
                          "pos_cnum": 2790
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 70,
                          "pos_bol": 3458,
                          "pos_cnum": 3475
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 60,
                      "pos_bol": 2790,
                      "pos_cnum": 2790
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 70,
                      "pos_bol": 3458,
                      "pos_cnum": 3475
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 60,
                "pos_bol": 2790,
                "pos_cnum": 2790
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 70,
                "pos_bol": 3458,
                "pos_cnum": 3475
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 71,
            "pos_bol": 3476,
            "pos_cnum": 3476
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 78,
            "pos_bol": 3594,
            "pos_cnum": 3609
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 71,
        "pos_bol": 3476,
        "pos_cnum": 3476
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 78,
        "pos_bol": 3594,
        "pos_cnum": 3609
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_attribute",
      {
        "attr_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "_none_",
              "pos_lnum": 0,
              "pos_bol": 0,
              "pos_cnum": -1
            },
            "loc_end": {
              "pos_fname": "_none_",
              "pos_lnum": 0,
              "pos_bol": 0,
              "pos_cnum": -1
            },
            "loc_ghost": true
          },
          "txt2": "ocaml.text"
        },
        "attr_payload": [
          "PStr",
          [
            {
              "pstr_desc": [
                "Pstr_eval",
                {
                  "pexp_desc": [
                    "Pexp_constant",
                    [
                      "Pconst_string",
                      " Returns the first (leftmost) or last (rightmost) element in the tree. ",
                      {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 80,
                          "pos_bol": 3611,
                          "pos_cnum": 3611
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 80,
                          "pos_bol": 3611,
                          "pos_cnum": 3687
                        },
                        "loc_ghost": false
                      },
                      null
                    ]
                  ],
                  "pexp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 80,
                      "pos_bol": 3611,
                      "pos_cnum": 3611
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 80,
                      "pos_bol": 3611,
                      "pos_cnum": 3687
                    },
                    "loc_ghost": false
                  },
                  "pexp_loc_stack": [],
                  "pexp_attributes": []
                },
                []
              ],
              "pstr_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 80,
                  "pos_bol": 3611,
                  "pos_cnum": 3611
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 80,
                  "pos_bol": 3611,
                  "pos_cnum": 3687
                },
                "loc_ghost": false
              }
            }
          ]
        ],
        "attr_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 80,
            "pos_bol": 3611,
            "pos_cnum": 3611
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 80,
            "pos_bol": 3611,
            "pos_cnum": 3687
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 80,
        "pos_bol": 3611,
        "pos_cnum": 3611
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 80,
        "pos_bol": 3611,
        "pos_cnum": 3687
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 82,
              "pos_bol": 3689,
              "pos_cnum": 3693
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 82,
              "pos_bol": 3689,
              "pos_cnum": 3698
            },
            "loc_ghost": false
          },
          "txt2": "first"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 82,
                        "pos_bol": 3689,
                        "pos_cnum": 3702
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 82,
                        "pos_bol": 3689,
                        "pos_cnum": 3704
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 82,
                        "pos_bol": 3689,
                        "pos_cnum": 3706
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 82,
                        "pos_bol": 3689,
                        "pos_cnum": 3708
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 82,
                  "pos_bol": 3689,
                  "pos_cnum": 3701
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 82,
                  "pos_bol": 3689,
                  "pos_cnum": 3711
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "option",
                [
                  {
                    "ptyp_desc": [
                      "Ptyp_tuple",
                      [
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 82,
                              "pos_bol": 3689,
                              "pos_cnum": 3716
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 82,
                              "pos_bol": 3689,
                              "pos_cnum": 3718
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_var", "v" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 82,
                              "pos_bol": 3689,
                              "pos_cnum": 3721
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 82,
                              "pos_bol": 3689,
                              "pos_cnum": 3723
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ]
                    ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 82,
                        "pos_bol": 3689,
                        "pos_cnum": 3716
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 82,
                        "pos_bol": 3689,
                        "pos_cnum": 3723
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 82,
                  "pos_bol": 3689,
                  "pos_cnum": 3715
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 82,
                  "pos_bol": 3689,
                  "pos_cnum": 3731
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 82,
              "pos_bol": 3689,
              "pos_cnum": 3701
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 82,
              "pos_bol": 3689,
              "pos_cnum": 3731
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 82,
            "pos_bol": 3689,
            "pos_cnum": 3689
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 82,
            "pos_bol": 3689,
            "pos_cnum": 3731
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 82,
        "pos_bol": 3689,
        "pos_cnum": 3689
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 82,
        "pos_bol": 3689,
        "pos_cnum": 3731
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 83,
              "pos_bol": 3732,
              "pos_cnum": 3736
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 83,
              "pos_bol": 3732,
              "pos_cnum": 3740
            },
            "loc_ghost": false
          },
          "txt2": "last"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 83,
                        "pos_bol": 3732,
                        "pos_cnum": 3744
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 83,
                        "pos_bol": 3732,
                        "pos_cnum": 3746
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 83,
                        "pos_bol": 3732,
                        "pos_cnum": 3748
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 83,
                        "pos_bol": 3732,
                        "pos_cnum": 3750
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 83,
                  "pos_bol": 3732,
                  "pos_cnum": 3743
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 83,
                  "pos_bol": 3732,
                  "pos_cnum": 3753
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "option",
                [
                  {
                    "ptyp_desc": [
                      "Ptyp_tuple",
                      [
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 83,
                              "pos_bol": 3732,
                              "pos_cnum": 3758
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 83,
                              "pos_bol": 3732,
                              "pos_cnum": 3760
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_var", "v" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 83,
                              "pos_bol": 3732,
                              "pos_cnum": 3763
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 83,
                              "pos_bol": 3732,
                              "pos_cnum": 3765
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ]
                    ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 83,
                        "pos_bol": 3732,
                        "pos_cnum": 3758
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 83,
                        "pos_bol": 3732,
                        "pos_cnum": 3765
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 83,
                  "pos_bol": 3732,
                  "pos_cnum": 3757
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 83,
                  "pos_bol": 3732,
                  "pos_cnum": 3773
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 83,
              "pos_bol": 3732,
              "pos_cnum": 3743
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 83,
              "pos_bol": 3732,
              "pos_cnum": 3773
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 83,
            "pos_bol": 3732,
            "pos_cnum": 3732
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 83,
            "pos_bol": 3732,
            "pos_cnum": 3773
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 83,
        "pos_bol": 3732,
        "pos_cnum": 3732
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 83,
        "pos_bol": 3732,
        "pos_cnum": 3773
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 87,
              "pos_bol": 3892,
              "pos_cnum": 3896
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 87,
              "pos_bol": 3892,
              "pos_cnum": 3900
            },
            "loc_ghost": false
          },
          "txt2": "find"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 87,
                        "pos_bol": 3892,
                        "pos_cnum": 3904
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 87,
                        "pos_bol": 3892,
                        "pos_cnum": 3906
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 87,
                        "pos_bol": 3892,
                        "pos_cnum": 3908
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 87,
                        "pos_bol": 3892,
                        "pos_cnum": 3910
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 87,
                  "pos_bol": 3892,
                  "pos_cnum": 3903
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 87,
                  "pos_bol": 3892,
                  "pos_cnum": 3913
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3926
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3928
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 87,
                              "pos_bol": 3892,
                              "pos_cnum": 3932
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 87,
                              "pos_bol": 3892,
                              "pos_cnum": 3934
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 87,
                              "pos_bol": 3892,
                              "pos_cnum": 3938
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 87,
                              "pos_bol": 3892,
                              "pos_cnum": 3941
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3932
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3941
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 87,
                      "pos_bol": 3892,
                      "pos_cnum": 3926
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 87,
                      "pos_bol": 3892,
                      "pos_cnum": 3941
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3946
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3948
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_constr",
                        "option",
                        [
                          {
                            "ptyp_desc": [ "Ptyp_var", "v" ],
                            "ptyp_loc": {
                              "loc_start": {
                                "pos_fname": "./_opam/lib/base/avltree.mli",
                                "pos_lnum": 87,
                                "pos_bol": 3892,
                                "pos_cnum": 3952
                              },
                              "loc_end": {
                                "pos_fname": "./_opam/lib/base/avltree.mli",
                                "pos_lnum": 87,
                                "pos_bol": 3892,
                                "pos_cnum": 3954
                              },
                              "loc_ghost": false
                            },
                            "ptyp_loc_stack": [],
                            "ptyp_attributes": []
                          }
                        ]
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3952
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 87,
                          "pos_bol": 3892,
                          "pos_cnum": 3961
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 87,
                      "pos_bol": 3892,
                      "pos_cnum": 3946
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 87,
                      "pos_bol": 3892,
                      "pos_cnum": 3961
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 87,
                  "pos_bol": 3892,
                  "pos_cnum": 3917
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 87,
                  "pos_bol": 3892,
                  "pos_cnum": 3961
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 87,
              "pos_bol": 3892,
              "pos_cnum": 3903
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 87,
              "pos_bol": 3892,
              "pos_cnum": 3961
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " If the specified key exists in the tree, returns the corresponding value.  O(log(N))\n    time and O(1) space. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 85,
                              "pos_bol": 3775,
                              "pos_cnum": 3775
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 86,
                              "pos_bol": 3864,
                              "pos_cnum": 3891
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 85,
                          "pos_bol": 3775,
                          "pos_cnum": 3775
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 86,
                          "pos_bol": 3864,
                          "pos_cnum": 3891
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 85,
                      "pos_bol": 3775,
                      "pos_cnum": 3775
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 86,
                      "pos_bol": 3864,
                      "pos_cnum": 3891
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 85,
                "pos_bol": 3775,
                "pos_cnum": 3775
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 86,
                "pos_bol": 3864,
                "pos_cnum": 3891
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 87,
            "pos_bol": 3892,
            "pos_cnum": 3892
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 87,
            "pos_bol": 3892,
            "pos_cnum": 3961
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 87,
        "pos_bol": 3892,
        "pos_cnum": 3892
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 87,
        "pos_bol": 3892,
        "pos_cnum": 3961
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 96,
              "pos_bol": 4177,
              "pos_cnum": 4181
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 96,
              "pos_bol": 4177,
              "pos_cnum": 4194
            },
            "loc_ghost": false
          },
          "txt2": "find_and_call"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 97,
                        "pos_bol": 4195,
                        "pos_cnum": 4201
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 97,
                        "pos_bol": 4195,
                        "pos_cnum": 4203
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 97,
                        "pos_bol": 4195,
                        "pos_cnum": 4205
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 97,
                        "pos_bol": 4195,
                        "pos_cnum": 4207
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 97,
                  "pos_bol": 4195,
                  "pos_cnum": 4200
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 97,
                  "pos_bol": 4195,
                  "pos_cnum": 4210
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 98,
                          "pos_bol": 4211,
                          "pos_cnum": 4225
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 98,
                          "pos_bol": 4211,
                          "pos_cnum": 4227
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 98,
                              "pos_bol": 4211,
                              "pos_cnum": 4231
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 98,
                              "pos_bol": 4211,
                              "pos_cnum": 4233
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 98,
                              "pos_bol": 4211,
                              "pos_cnum": 4237
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 98,
                              "pos_bol": 4211,
                              "pos_cnum": 4240
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 98,
                          "pos_bol": 4211,
                          "pos_cnum": 4231
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 98,
                          "pos_bol": 4211,
                          "pos_cnum": 4240
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 98,
                      "pos_bol": 4211,
                      "pos_cnum": 4225
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 98,
                      "pos_bol": 4211,
                      "pos_cnum": 4240
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 99,
                          "pos_bol": 4242,
                          "pos_cnum": 4247
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 99,
                          "pos_bol": 4242,
                          "pos_cnum": 4249
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "if_found" ],
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Nolabel" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "v" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 100,
                                  "pos_bol": 4250,
                                  "pos_cnum": 4265
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 100,
                                  "pos_bol": 4250,
                                  "pos_cnum": 4267
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [ "Ptyp_var", "a" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 100,
                                  "pos_bol": 4250,
                                  "pos_cnum": 4271
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 100,
                                  "pos_bol": 4250,
                                  "pos_cnum": 4273
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 100,
                              "pos_bol": 4250,
                              "pos_cnum": 4265
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 100,
                              "pos_bol": 4250,
                              "pos_cnum": 4273
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "if_not_found" ],
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Nolabel" ],
                                {
                                  "ptyp_desc": [ "Ptyp_var", "k" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 101,
                                      "pos_bol": 4275,
                                      "pos_cnum": 4294
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 101,
                                      "pos_bol": 4275,
                                      "pos_cnum": 4296
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [ "Ptyp_var", "a" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 101,
                                      "pos_bol": 4275,
                                      "pos_cnum": 4300
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 101,
                                      "pos_bol": 4275,
                                      "pos_cnum": 4302
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 101,
                                  "pos_bol": 4275,
                                  "pos_cnum": 4294
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 101,
                                  "pos_bol": 4275,
                                  "pos_cnum": 4302
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [ "Ptyp_var", "a" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 102,
                                  "pos_bol": 4304,
                                  "pos_cnum": 4309
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 102,
                                  "pos_bol": 4304,
                                  "pos_cnum": 4311
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 101,
                              "pos_bol": 4275,
                              "pos_cnum": 4280
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 102,
                              "pos_bol": 4304,
                              "pos_cnum": 4311
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 100,
                          "pos_bol": 4250,
                          "pos_cnum": 4255
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 102,
                          "pos_bol": 4304,
                          "pos_cnum": 4311
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 99,
                      "pos_bol": 4242,
                      "pos_cnum": 4247
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 102,
                      "pos_bol": 4304,
                      "pos_cnum": 4311
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 98,
                  "pos_bol": 4211,
                  "pos_cnum": 4216
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 102,
                  "pos_bol": 4304,
                  "pos_cnum": 4311
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 97,
              "pos_bol": 4195,
              "pos_cnum": 4200
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 102,
              "pos_bol": 4304,
              "pos_cnum": 4311
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " [find_and_call t ~compare k ~if_found ~if_not_found]\n\n    is equivalent to:\n\n    [match find t ~compare k with Some v -> if_found v | None -> if_not_found k]\n\n    except that it doesn't allocate the option. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 89,
                              "pos_bol": 3963,
                              "pos_cnum": 3963
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 95,
                              "pos_bol": 4126,
                              "pos_cnum": 4176
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 89,
                          "pos_bol": 3963,
                          "pos_cnum": 3963
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 95,
                          "pos_bol": 4126,
                          "pos_cnum": 4176
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 89,
                      "pos_bol": 3963,
                      "pos_cnum": 3963
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 95,
                      "pos_bol": 4126,
                      "pos_cnum": 4176
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 89,
                "pos_bol": 3963,
                "pos_cnum": 3963
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 95,
                "pos_bol": 4126,
                "pos_cnum": 4176
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 96,
            "pos_bol": 4177,
            "pos_cnum": 4177
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 102,
            "pos_bol": 4304,
            "pos_cnum": 4311
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 96,
        "pos_bol": 4177,
        "pos_cnum": 4177
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 102,
        "pos_bol": 4304,
        "pos_cnum": 4311
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 104,
              "pos_bol": 4313,
              "pos_cnum": 4317
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 104,
              "pos_bol": 4313,
              "pos_cnum": 4331
            },
            "loc_ghost": false
          },
          "txt2": "find_and_call1"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 105,
                        "pos_bol": 4332,
                        "pos_cnum": 4338
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 105,
                        "pos_bol": 4332,
                        "pos_cnum": 4340
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 105,
                        "pos_bol": 4332,
                        "pos_cnum": 4342
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 105,
                        "pos_bol": 4332,
                        "pos_cnum": 4344
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 105,
                  "pos_bol": 4332,
                  "pos_cnum": 4337
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 105,
                  "pos_bol": 4332,
                  "pos_cnum": 4347
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 106,
                          "pos_bol": 4348,
                          "pos_cnum": 4362
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 106,
                          "pos_bol": 4348,
                          "pos_cnum": 4364
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 106,
                              "pos_bol": 4348,
                              "pos_cnum": 4368
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 106,
                              "pos_bol": 4348,
                              "pos_cnum": 4370
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 106,
                              "pos_bol": 4348,
                              "pos_cnum": 4374
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 106,
                              "pos_bol": 4348,
                              "pos_cnum": 4377
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 106,
                          "pos_bol": 4348,
                          "pos_cnum": 4368
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 106,
                          "pos_bol": 4348,
                          "pos_cnum": 4377
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 106,
                      "pos_bol": 4348,
                      "pos_cnum": 4362
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 106,
                      "pos_bol": 4348,
                      "pos_cnum": 4377
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 107,
                          "pos_bol": 4379,
                          "pos_cnum": 4384
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 107,
                          "pos_bol": 4379,
                          "pos_cnum": 4386
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "a" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "a" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 108,
                              "pos_bol": 4387,
                              "pos_cnum": 4394
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 108,
                              "pos_bol": 4387,
                              "pos_cnum": 4396
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "if_found" ],
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Nolabel" ],
                                {
                                  "ptyp_desc": [ "Ptyp_var", "v" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 109,
                                      "pos_bol": 4397,
                                      "pos_cnum": 4412
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 109,
                                      "pos_bol": 4397,
                                      "pos_cnum": 4414
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Nolabel" ],
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "a" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 109,
                                          "pos_bol": 4397,
                                          "pos_cnum": 4418
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 109,
                                          "pos_bol": 4397,
                                          "pos_cnum": 4420
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "b" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 109,
                                          "pos_bol": 4397,
                                          "pos_cnum": 4424
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 109,
                                          "pos_bol": 4397,
                                          "pos_cnum": 4426
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 109,
                                      "pos_bol": 4397,
                                      "pos_cnum": 4418
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 109,
                                      "pos_bol": 4397,
                                      "pos_cnum": 4426
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 109,
                                  "pos_bol": 4397,
                                  "pos_cnum": 4412
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 109,
                                  "pos_bol": 4397,
                                  "pos_cnum": 4426
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Labelled", "if_not_found" ],
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Nolabel" ],
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "k" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 110,
                                          "pos_bol": 4428,
                                          "pos_cnum": 4447
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 110,
                                          "pos_bol": 4428,
                                          "pos_cnum": 4449
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [
                                        "Ptyp_arrow",
                                        [ "Nolabel" ],
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "a" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 110,
                                              "pos_bol": 4428,
                                              "pos_cnum": 4453
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 110,
                                              "pos_bol": 4428,
                                              "pos_cnum": 4455
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        },
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "b" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 110,
                                              "pos_bol": 4428,
                                              "pos_cnum": 4459
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 110,
                                              "pos_bol": 4428,
                                              "pos_cnum": 4461
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        }
                                      ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 110,
                                          "pos_bol": 4428,
                                          "pos_cnum": 4453
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 110,
                                          "pos_bol": 4428,
                                          "pos_cnum": 4461
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 110,
                                      "pos_bol": 4428,
                                      "pos_cnum": 4447
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 110,
                                      "pos_bol": 4428,
                                      "pos_cnum": 4461
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [ "Ptyp_var", "b" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 111,
                                      "pos_bol": 4463,
                                      "pos_cnum": 4468
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 111,
                                      "pos_bol": 4463,
                                      "pos_cnum": 4470
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 110,
                                  "pos_bol": 4428,
                                  "pos_cnum": 4433
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 111,
                                  "pos_bol": 4463,
                                  "pos_cnum": 4470
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 109,
                              "pos_bol": 4397,
                              "pos_cnum": 4402
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 111,
                              "pos_bol": 4463,
                              "pos_cnum": 4470
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 108,
                          "pos_bol": 4387,
                          "pos_cnum": 4392
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 111,
                          "pos_bol": 4463,
                          "pos_cnum": 4470
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 107,
                      "pos_bol": 4379,
                      "pos_cnum": 4384
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 111,
                      "pos_bol": 4463,
                      "pos_cnum": 4470
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 106,
                  "pos_bol": 4348,
                  "pos_cnum": 4353
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 111,
                  "pos_bol": 4463,
                  "pos_cnum": 4470
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 105,
              "pos_bol": 4332,
              "pos_cnum": 4337
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 111,
              "pos_bol": 4463,
              "pos_cnum": 4470
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 104,
            "pos_bol": 4313,
            "pos_cnum": 4313
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 111,
            "pos_bol": 4463,
            "pos_cnum": 4470
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 104,
        "pos_bol": 4313,
        "pos_cnum": 4313
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 111,
        "pos_bol": 4463,
        "pos_cnum": 4470
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 113,
              "pos_bol": 4472,
              "pos_cnum": 4476
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 113,
              "pos_bol": 4472,
              "pos_cnum": 4490
            },
            "loc_ghost": false
          },
          "txt2": "find_and_call2"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 114,
                        "pos_bol": 4491,
                        "pos_cnum": 4497
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 114,
                        "pos_bol": 4491,
                        "pos_cnum": 4499
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 114,
                        "pos_bol": 4491,
                        "pos_cnum": 4501
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 114,
                        "pos_bol": 4491,
                        "pos_cnum": 4503
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 114,
                  "pos_bol": 4491,
                  "pos_cnum": 4496
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 114,
                  "pos_bol": 4491,
                  "pos_cnum": 4506
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 115,
                          "pos_bol": 4507,
                          "pos_cnum": 4521
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 115,
                          "pos_bol": 4507,
                          "pos_cnum": 4523
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 115,
                              "pos_bol": 4507,
                              "pos_cnum": 4527
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 115,
                              "pos_bol": 4507,
                              "pos_cnum": 4529
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 115,
                              "pos_bol": 4507,
                              "pos_cnum": 4533
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 115,
                              "pos_bol": 4507,
                              "pos_cnum": 4536
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 115,
                          "pos_bol": 4507,
                          "pos_cnum": 4527
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 115,
                          "pos_bol": 4507,
                          "pos_cnum": 4536
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 115,
                      "pos_bol": 4507,
                      "pos_cnum": 4521
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 115,
                      "pos_bol": 4507,
                      "pos_cnum": 4536
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 116,
                          "pos_bol": 4538,
                          "pos_cnum": 4543
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 116,
                          "pos_bol": 4538,
                          "pos_cnum": 4545
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "a" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "a" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 117,
                              "pos_bol": 4546,
                              "pos_cnum": 4553
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 117,
                              "pos_bol": 4546,
                              "pos_cnum": 4555
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "b" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "b" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 118,
                                  "pos_bol": 4556,
                                  "pos_cnum": 4563
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 118,
                                  "pos_bol": 4556,
                                  "pos_cnum": 4565
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Labelled", "if_found" ],
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Nolabel" ],
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "v" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 119,
                                          "pos_bol": 4566,
                                          "pos_cnum": 4581
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 119,
                                          "pos_bol": 4566,
                                          "pos_cnum": 4583
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [
                                        "Ptyp_arrow",
                                        [ "Nolabel" ],
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "a" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 119,
                                              "pos_bol": 4566,
                                              "pos_cnum": 4587
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 119,
                                              "pos_bol": 4566,
                                              "pos_cnum": 4589
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        },
                                        {
                                          "ptyp_desc": [
                                            "Ptyp_arrow",
                                            [ "Nolabel" ],
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_var", "b"
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 119,
                                                  "pos_bol": 4566,
                                                  "pos_cnum": 4593
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 119,
                                                  "pos_bol": 4566,
                                                  "pos_cnum": 4595
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            },
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_var", "c"
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 119,
                                                  "pos_bol": 4566,
                                                  "pos_cnum": 4599
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 119,
                                                  "pos_bol": 4566,
                                                  "pos_cnum": 4601
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            }
                                          ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 119,
                                              "pos_bol": 4566,
                                              "pos_cnum": 4593
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 119,
                                              "pos_bol": 4566,
                                              "pos_cnum": 4601
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        }
                                      ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 119,
                                          "pos_bol": 4566,
                                          "pos_cnum": 4587
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 119,
                                          "pos_bol": 4566,
                                          "pos_cnum": 4601
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 119,
                                      "pos_bol": 4566,
                                      "pos_cnum": 4581
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 119,
                                      "pos_bol": 4566,
                                      "pos_cnum": 4601
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Labelled", "if_not_found" ],
                                    {
                                      "ptyp_desc": [
                                        "Ptyp_arrow",
                                        [ "Nolabel" ],
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "k" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 120,
                                              "pos_bol": 4603,
                                              "pos_cnum": 4622
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 120,
                                              "pos_bol": 4603,
                                              "pos_cnum": 4624
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        },
                                        {
                                          "ptyp_desc": [
                                            "Ptyp_arrow",
                                            [ "Nolabel" ],
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_var", "a"
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 120,
                                                  "pos_bol": 4603,
                                                  "pos_cnum": 4628
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 120,
                                                  "pos_bol": 4603,
                                                  "pos_cnum": 4630
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            },
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_arrow",
                                                [ "Nolabel" ],
                                                {
                                                  "ptyp_desc": [
                                                    "Ptyp_var", "b"
                                                  ],
                                                  "ptyp_loc": {
                                                    "loc_start": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 120,
                                                      "pos_bol": 4603,
                                                      "pos_cnum": 4634
                                                    },
                                                    "loc_end": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 120,
                                                      "pos_bol": 4603,
                                                      "pos_cnum": 4636
                                                    },
                                                    "loc_ghost": false
                                                  },
                                                  "ptyp_loc_stack": [],
                                                  "ptyp_attributes": []
                                                },
                                                {
                                                  "ptyp_desc": [
                                                    "Ptyp_var", "c"
                                                  ],
                                                  "ptyp_loc": {
                                                    "loc_start": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 120,
                                                      "pos_bol": 4603,
                                                      "pos_cnum": 4640
                                                    },
                                                    "loc_end": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 120,
                                                      "pos_bol": 4603,
                                                      "pos_cnum": 4642
                                                    },
                                                    "loc_ghost": false
                                                  },
                                                  "ptyp_loc_stack": [],
                                                  "ptyp_attributes": []
                                                }
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 120,
                                                  "pos_bol": 4603,
                                                  "pos_cnum": 4634
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 120,
                                                  "pos_bol": 4603,
                                                  "pos_cnum": 4642
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            }
                                          ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 120,
                                              "pos_bol": 4603,
                                              "pos_cnum": 4628
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 120,
                                              "pos_bol": 4603,
                                              "pos_cnum": 4642
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        }
                                      ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 120,
                                          "pos_bol": 4603,
                                          "pos_cnum": 4622
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 120,
                                          "pos_bol": 4603,
                                          "pos_cnum": 4642
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "c" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 121,
                                          "pos_bol": 4644,
                                          "pos_cnum": 4649
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 121,
                                          "pos_bol": 4644,
                                          "pos_cnum": 4651
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 120,
                                      "pos_bol": 4603,
                                      "pos_cnum": 4608
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 121,
                                      "pos_bol": 4644,
                                      "pos_cnum": 4651
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 119,
                                  "pos_bol": 4566,
                                  "pos_cnum": 4571
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 121,
                                  "pos_bol": 4644,
                                  "pos_cnum": 4651
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 118,
                              "pos_bol": 4556,
                              "pos_cnum": 4561
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 121,
                              "pos_bol": 4644,
                              "pos_cnum": 4651
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 117,
                          "pos_bol": 4546,
                          "pos_cnum": 4551
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 121,
                          "pos_bol": 4644,
                          "pos_cnum": 4651
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 116,
                      "pos_bol": 4538,
                      "pos_cnum": 4543
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 121,
                      "pos_bol": 4644,
                      "pos_cnum": 4651
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 115,
                  "pos_bol": 4507,
                  "pos_cnum": 4512
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 121,
                  "pos_bol": 4644,
                  "pos_cnum": 4651
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 114,
              "pos_bol": 4491,
              "pos_cnum": 4496
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 121,
              "pos_bol": 4644,
              "pos_cnum": 4651
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 113,
            "pos_bol": 4472,
            "pos_cnum": 4472
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 121,
            "pos_bol": 4644,
            "pos_cnum": 4651
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 113,
        "pos_bol": 4472,
        "pos_cnum": 4472
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 121,
        "pos_bol": 4644,
        "pos_cnum": 4651
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 123,
              "pos_bol": 4653,
              "pos_cnum": 4657
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 123,
              "pos_bol": 4653,
              "pos_cnum": 4671
            },
            "loc_ghost": false
          },
          "txt2": "findi_and_call"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 124,
                        "pos_bol": 4672,
                        "pos_cnum": 4678
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 124,
                        "pos_bol": 4672,
                        "pos_cnum": 4680
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 124,
                        "pos_bol": 4672,
                        "pos_cnum": 4682
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 124,
                        "pos_bol": 4672,
                        "pos_cnum": 4684
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 124,
                  "pos_bol": 4672,
                  "pos_cnum": 4677
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 124,
                  "pos_bol": 4672,
                  "pos_cnum": 4687
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 125,
                          "pos_bol": 4688,
                          "pos_cnum": 4702
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 125,
                          "pos_bol": 4688,
                          "pos_cnum": 4704
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 125,
                              "pos_bol": 4688,
                              "pos_cnum": 4708
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 125,
                              "pos_bol": 4688,
                              "pos_cnum": 4710
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 125,
                              "pos_bol": 4688,
                              "pos_cnum": 4714
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 125,
                              "pos_bol": 4688,
                              "pos_cnum": 4717
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 125,
                          "pos_bol": 4688,
                          "pos_cnum": 4708
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 125,
                          "pos_bol": 4688,
                          "pos_cnum": 4717
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 125,
                      "pos_bol": 4688,
                      "pos_cnum": 4702
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 125,
                      "pos_bol": 4688,
                      "pos_cnum": 4717
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 126,
                          "pos_bol": 4719,
                          "pos_cnum": 4724
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 126,
                          "pos_bol": 4719,
                          "pos_cnum": 4726
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "if_found" ],
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "key" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "k" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 127,
                                  "pos_bol": 4727,
                                  "pos_cnum": 4746
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 127,
                                  "pos_bol": 4727,
                                  "pos_cnum": 4748
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Labelled", "data" ],
                                {
                                  "ptyp_desc": [ "Ptyp_var", "v" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 127,
                                      "pos_bol": 4727,
                                      "pos_cnum": 4757
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 127,
                                      "pos_bol": 4727,
                                      "pos_cnum": 4759
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [ "Ptyp_var", "a" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 127,
                                      "pos_bol": 4727,
                                      "pos_cnum": 4763
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 127,
                                      "pos_bol": 4727,
                                      "pos_cnum": 4765
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 127,
                                  "pos_bol": 4727,
                                  "pos_cnum": 4752
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 127,
                                  "pos_bol": 4727,
                                  "pos_cnum": 4765
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 127,
                              "pos_bol": 4727,
                              "pos_cnum": 4742
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 127,
                              "pos_bol": 4727,
                              "pos_cnum": 4765
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "if_not_found" ],
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Nolabel" ],
                                {
                                  "ptyp_desc": [ "Ptyp_var", "k" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 128,
                                      "pos_bol": 4767,
                                      "pos_cnum": 4786
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 128,
                                      "pos_bol": 4767,
                                      "pos_cnum": 4788
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [ "Ptyp_var", "a" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 128,
                                      "pos_bol": 4767,
                                      "pos_cnum": 4792
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 128,
                                      "pos_bol": 4767,
                                      "pos_cnum": 4794
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 128,
                                  "pos_bol": 4767,
                                  "pos_cnum": 4786
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 128,
                                  "pos_bol": 4767,
                                  "pos_cnum": 4794
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [ "Ptyp_var", "a" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 129,
                                  "pos_bol": 4796,
                                  "pos_cnum": 4801
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 129,
                                  "pos_bol": 4796,
                                  "pos_cnum": 4803
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 128,
                              "pos_bol": 4767,
                              "pos_cnum": 4772
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 129,
                              "pos_bol": 4796,
                              "pos_cnum": 4803
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 127,
                          "pos_bol": 4727,
                          "pos_cnum": 4732
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 129,
                          "pos_bol": 4796,
                          "pos_cnum": 4803
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 126,
                      "pos_bol": 4719,
                      "pos_cnum": 4724
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 129,
                      "pos_bol": 4796,
                      "pos_cnum": 4803
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 125,
                  "pos_bol": 4688,
                  "pos_cnum": 4693
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 129,
                  "pos_bol": 4796,
                  "pos_cnum": 4803
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 124,
              "pos_bol": 4672,
              "pos_cnum": 4677
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 129,
              "pos_bol": 4796,
              "pos_cnum": 4803
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 123,
            "pos_bol": 4653,
            "pos_cnum": 4653
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 129,
            "pos_bol": 4796,
            "pos_cnum": 4803
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 123,
        "pos_bol": 4653,
        "pos_cnum": 4653
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 129,
        "pos_bol": 4796,
        "pos_cnum": 4803
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 131,
              "pos_bol": 4805,
              "pos_cnum": 4809
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 131,
              "pos_bol": 4805,
              "pos_cnum": 4824
            },
            "loc_ghost": false
          },
          "txt2": "findi_and_call1"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 132,
                        "pos_bol": 4825,
                        "pos_cnum": 4831
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 132,
                        "pos_bol": 4825,
                        "pos_cnum": 4833
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 132,
                        "pos_bol": 4825,
                        "pos_cnum": 4835
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 132,
                        "pos_bol": 4825,
                        "pos_cnum": 4837
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 132,
                  "pos_bol": 4825,
                  "pos_cnum": 4830
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 132,
                  "pos_bol": 4825,
                  "pos_cnum": 4840
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 133,
                          "pos_bol": 4841,
                          "pos_cnum": 4855
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 133,
                          "pos_bol": 4841,
                          "pos_cnum": 4857
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 133,
                              "pos_bol": 4841,
                              "pos_cnum": 4861
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 133,
                              "pos_bol": 4841,
                              "pos_cnum": 4863
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 133,
                              "pos_bol": 4841,
                              "pos_cnum": 4867
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 133,
                              "pos_bol": 4841,
                              "pos_cnum": 4870
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 133,
                          "pos_bol": 4841,
                          "pos_cnum": 4861
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 133,
                          "pos_bol": 4841,
                          "pos_cnum": 4870
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 133,
                      "pos_bol": 4841,
                      "pos_cnum": 4855
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 133,
                      "pos_bol": 4841,
                      "pos_cnum": 4870
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 134,
                          "pos_bol": 4872,
                          "pos_cnum": 4877
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 134,
                          "pos_bol": 4872,
                          "pos_cnum": 4879
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "a" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "a" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 135,
                              "pos_bol": 4880,
                              "pos_cnum": 4887
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 135,
                              "pos_bol": 4880,
                              "pos_cnum": 4889
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "if_found" ],
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Labelled", "key" ],
                                {
                                  "ptyp_desc": [ "Ptyp_var", "k" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 136,
                                      "pos_bol": 4890,
                                      "pos_cnum": 4909
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 136,
                                      "pos_bol": 4890,
                                      "pos_cnum": 4911
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Labelled", "data" ],
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "v" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 136,
                                          "pos_bol": 4890,
                                          "pos_cnum": 4920
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 136,
                                          "pos_bol": 4890,
                                          "pos_cnum": 4922
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [
                                        "Ptyp_arrow",
                                        [ "Nolabel" ],
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "a" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 136,
                                              "pos_bol": 4890,
                                              "pos_cnum": 4926
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 136,
                                              "pos_bol": 4890,
                                              "pos_cnum": 4928
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        },
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "b" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 136,
                                              "pos_bol": 4890,
                                              "pos_cnum": 4932
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 136,
                                              "pos_bol": 4890,
                                              "pos_cnum": 4934
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        }
                                      ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 136,
                                          "pos_bol": 4890,
                                          "pos_cnum": 4926
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 136,
                                          "pos_bol": 4890,
                                          "pos_cnum": 4934
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 136,
                                      "pos_bol": 4890,
                                      "pos_cnum": 4915
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 136,
                                      "pos_bol": 4890,
                                      "pos_cnum": 4934
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 136,
                                  "pos_bol": 4890,
                                  "pos_cnum": 4905
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 136,
                                  "pos_bol": 4890,
                                  "pos_cnum": 4934
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Labelled", "if_not_found" ],
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Nolabel" ],
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "k" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 137,
                                          "pos_bol": 4936,
                                          "pos_cnum": 4955
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 137,
                                          "pos_bol": 4936,
                                          "pos_cnum": 4957
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [
                                        "Ptyp_arrow",
                                        [ "Nolabel" ],
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "a" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 137,
                                              "pos_bol": 4936,
                                              "pos_cnum": 4961
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 137,
                                              "pos_bol": 4936,
                                              "pos_cnum": 4963
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        },
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "b" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 137,
                                              "pos_bol": 4936,
                                              "pos_cnum": 4967
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 137,
                                              "pos_bol": 4936,
                                              "pos_cnum": 4969
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        }
                                      ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 137,
                                          "pos_bol": 4936,
                                          "pos_cnum": 4961
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 137,
                                          "pos_bol": 4936,
                                          "pos_cnum": 4969
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 137,
                                      "pos_bol": 4936,
                                      "pos_cnum": 4955
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 137,
                                      "pos_bol": 4936,
                                      "pos_cnum": 4969
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [ "Ptyp_var", "b" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 138,
                                      "pos_bol": 4971,
                                      "pos_cnum": 4976
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 138,
                                      "pos_bol": 4971,
                                      "pos_cnum": 4978
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 137,
                                  "pos_bol": 4936,
                                  "pos_cnum": 4941
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 138,
                                  "pos_bol": 4971,
                                  "pos_cnum": 4978
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 136,
                              "pos_bol": 4890,
                              "pos_cnum": 4895
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 138,
                              "pos_bol": 4971,
                              "pos_cnum": 4978
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 135,
                          "pos_bol": 4880,
                          "pos_cnum": 4885
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 138,
                          "pos_bol": 4971,
                          "pos_cnum": 4978
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 134,
                      "pos_bol": 4872,
                      "pos_cnum": 4877
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 138,
                      "pos_bol": 4971,
                      "pos_cnum": 4978
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 133,
                  "pos_bol": 4841,
                  "pos_cnum": 4846
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 138,
                  "pos_bol": 4971,
                  "pos_cnum": 4978
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 132,
              "pos_bol": 4825,
              "pos_cnum": 4830
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 138,
              "pos_bol": 4971,
              "pos_cnum": 4978
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 131,
            "pos_bol": 4805,
            "pos_cnum": 4805
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 138,
            "pos_bol": 4971,
            "pos_cnum": 4978
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 131,
        "pos_bol": 4805,
        "pos_cnum": 4805
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 138,
        "pos_bol": 4971,
        "pos_cnum": 4978
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 140,
              "pos_bol": 4980,
              "pos_cnum": 4984
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 140,
              "pos_bol": 4980,
              "pos_cnum": 4999
            },
            "loc_ghost": false
          },
          "txt2": "findi_and_call2"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 141,
                        "pos_bol": 5000,
                        "pos_cnum": 5006
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 141,
                        "pos_bol": 5000,
                        "pos_cnum": 5008
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 141,
                        "pos_bol": 5000,
                        "pos_cnum": 5010
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 141,
                        "pos_bol": 5000,
                        "pos_cnum": 5012
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 141,
                  "pos_bol": 5000,
                  "pos_cnum": 5005
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 141,
                  "pos_bol": 5000,
                  "pos_cnum": 5015
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 142,
                          "pos_bol": 5016,
                          "pos_cnum": 5030
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 142,
                          "pos_bol": 5016,
                          "pos_cnum": 5032
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 142,
                              "pos_bol": 5016,
                              "pos_cnum": 5036
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 142,
                              "pos_bol": 5016,
                              "pos_cnum": 5038
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 142,
                              "pos_bol": 5016,
                              "pos_cnum": 5042
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 142,
                              "pos_bol": 5016,
                              "pos_cnum": 5045
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 142,
                          "pos_bol": 5016,
                          "pos_cnum": 5036
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 142,
                          "pos_bol": 5016,
                          "pos_cnum": 5045
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 142,
                      "pos_bol": 5016,
                      "pos_cnum": 5030
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 142,
                      "pos_bol": 5016,
                      "pos_cnum": 5045
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 143,
                          "pos_bol": 5047,
                          "pos_cnum": 5052
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 143,
                          "pos_bol": 5047,
                          "pos_cnum": 5054
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "a" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "a" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 144,
                              "pos_bol": 5055,
                              "pos_cnum": 5062
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 144,
                              "pos_bol": 5055,
                              "pos_cnum": 5064
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "b" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "b" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 145,
                                  "pos_bol": 5065,
                                  "pos_cnum": 5072
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 145,
                                  "pos_bol": 5065,
                                  "pos_cnum": 5074
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Labelled", "if_found" ],
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Labelled", "key" ],
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "k" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 146,
                                          "pos_bol": 5075,
                                          "pos_cnum": 5094
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 146,
                                          "pos_bol": 5075,
                                          "pos_cnum": 5096
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [
                                        "Ptyp_arrow",
                                        [ "Labelled", "data" ],
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "v" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 146,
                                              "pos_bol": 5075,
                                              "pos_cnum": 5105
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 146,
                                              "pos_bol": 5075,
                                              "pos_cnum": 5107
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        },
                                        {
                                          "ptyp_desc": [
                                            "Ptyp_arrow",
                                            [ "Nolabel" ],
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_var", "a"
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 146,
                                                  "pos_bol": 5075,
                                                  "pos_cnum": 5111
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 146,
                                                  "pos_bol": 5075,
                                                  "pos_cnum": 5113
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            },
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_arrow",
                                                [ "Nolabel" ],
                                                {
                                                  "ptyp_desc": [
                                                    "Ptyp_var", "b"
                                                  ],
                                                  "ptyp_loc": {
                                                    "loc_start": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 146,
                                                      "pos_bol": 5075,
                                                      "pos_cnum": 5117
                                                    },
                                                    "loc_end": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 146,
                                                      "pos_bol": 5075,
                                                      "pos_cnum": 5119
                                                    },
                                                    "loc_ghost": false
                                                  },
                                                  "ptyp_loc_stack": [],
                                                  "ptyp_attributes": []
                                                },
                                                {
                                                  "ptyp_desc": [
                                                    "Ptyp_var", "c"
                                                  ],
                                                  "ptyp_loc": {
                                                    "loc_start": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 146,
                                                      "pos_bol": 5075,
                                                      "pos_cnum": 5123
                                                    },
                                                    "loc_end": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 146,
                                                      "pos_bol": 5075,
                                                      "pos_cnum": 5125
                                                    },
                                                    "loc_ghost": false
                                                  },
                                                  "ptyp_loc_stack": [],
                                                  "ptyp_attributes": []
                                                }
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 146,
                                                  "pos_bol": 5075,
                                                  "pos_cnum": 5117
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 146,
                                                  "pos_bol": 5075,
                                                  "pos_cnum": 5125
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            }
                                          ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 146,
                                              "pos_bol": 5075,
                                              "pos_cnum": 5111
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 146,
                                              "pos_bol": 5075,
                                              "pos_cnum": 5125
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        }
                                      ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 146,
                                          "pos_bol": 5075,
                                          "pos_cnum": 5100
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 146,
                                          "pos_bol": 5075,
                                          "pos_cnum": 5125
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 146,
                                      "pos_bol": 5075,
                                      "pos_cnum": 5090
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 146,
                                      "pos_bol": 5075,
                                      "pos_cnum": 5125
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [
                                    "Ptyp_arrow",
                                    [ "Labelled", "if_not_found" ],
                                    {
                                      "ptyp_desc": [
                                        "Ptyp_arrow",
                                        [ "Nolabel" ],
                                        {
                                          "ptyp_desc": [ "Ptyp_var", "k" ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 147,
                                              "pos_bol": 5127,
                                              "pos_cnum": 5146
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 147,
                                              "pos_bol": 5127,
                                              "pos_cnum": 5148
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        },
                                        {
                                          "ptyp_desc": [
                                            "Ptyp_arrow",
                                            [ "Nolabel" ],
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_var", "a"
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 147,
                                                  "pos_bol": 5127,
                                                  "pos_cnum": 5152
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 147,
                                                  "pos_bol": 5127,
                                                  "pos_cnum": 5154
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            },
                                            {
                                              "ptyp_desc": [
                                                "Ptyp_arrow",
                                                [ "Nolabel" ],
                                                {
                                                  "ptyp_desc": [
                                                    "Ptyp_var", "b"
                                                  ],
                                                  "ptyp_loc": {
                                                    "loc_start": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 147,
                                                      "pos_bol": 5127,
                                                      "pos_cnum": 5158
                                                    },
                                                    "loc_end": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 147,
                                                      "pos_bol": 5127,
                                                      "pos_cnum": 5160
                                                    },
                                                    "loc_ghost": false
                                                  },
                                                  "ptyp_loc_stack": [],
                                                  "ptyp_attributes": []
                                                },
                                                {
                                                  "ptyp_desc": [
                                                    "Ptyp_var", "c"
                                                  ],
                                                  "ptyp_loc": {
                                                    "loc_start": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 147,
                                                      "pos_bol": 5127,
                                                      "pos_cnum": 5164
                                                    },
                                                    "loc_end": {
                                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                                      "pos_lnum": 147,
                                                      "pos_bol": 5127,
                                                      "pos_cnum": 5166
                                                    },
                                                    "loc_ghost": false
                                                  },
                                                  "ptyp_loc_stack": [],
                                                  "ptyp_attributes": []
                                                }
                                              ],
                                              "ptyp_loc": {
                                                "loc_start": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 147,
                                                  "pos_bol": 5127,
                                                  "pos_cnum": 5158
                                                },
                                                "loc_end": {
                                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                                  "pos_lnum": 147,
                                                  "pos_bol": 5127,
                                                  "pos_cnum": 5166
                                                },
                                                "loc_ghost": false
                                              },
                                              "ptyp_loc_stack": [],
                                              "ptyp_attributes": []
                                            }
                                          ],
                                          "ptyp_loc": {
                                            "loc_start": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 147,
                                              "pos_bol": 5127,
                                              "pos_cnum": 5152
                                            },
                                            "loc_end": {
                                              "pos_fname": "./_opam/lib/base/avltree.mli",
                                              "pos_lnum": 147,
                                              "pos_bol": 5127,
                                              "pos_cnum": 5166
                                            },
                                            "loc_ghost": false
                                          },
                                          "ptyp_loc_stack": [],
                                          "ptyp_attributes": []
                                        }
                                      ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 147,
                                          "pos_bol": 5127,
                                          "pos_cnum": 5146
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 147,
                                          "pos_bol": 5127,
                                          "pos_cnum": 5166
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    },
                                    {
                                      "ptyp_desc": [ "Ptyp_var", "c" ],
                                      "ptyp_loc": {
                                        "loc_start": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 148,
                                          "pos_bol": 5168,
                                          "pos_cnum": 5173
                                        },
                                        "loc_end": {
                                          "pos_fname": "./_opam/lib/base/avltree.mli",
                                          "pos_lnum": 148,
                                          "pos_bol": 5168,
                                          "pos_cnum": 5175
                                        },
                                        "loc_ghost": false
                                      },
                                      "ptyp_loc_stack": [],
                                      "ptyp_attributes": []
                                    }
                                  ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 147,
                                      "pos_bol": 5127,
                                      "pos_cnum": 5132
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 148,
                                      "pos_bol": 5168,
                                      "pos_cnum": 5175
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 146,
                                  "pos_bol": 5075,
                                  "pos_cnum": 5080
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 148,
                                  "pos_bol": 5168,
                                  "pos_cnum": 5175
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 145,
                              "pos_bol": 5065,
                              "pos_cnum": 5070
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 148,
                              "pos_bol": 5168,
                              "pos_cnum": 5175
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 144,
                          "pos_bol": 5055,
                          "pos_cnum": 5060
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 148,
                          "pos_bol": 5168,
                          "pos_cnum": 5175
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 143,
                      "pos_bol": 5047,
                      "pos_cnum": 5052
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 148,
                      "pos_bol": 5168,
                      "pos_cnum": 5175
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 142,
                  "pos_bol": 5016,
                  "pos_cnum": 5021
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 148,
                  "pos_bol": 5168,
                  "pos_cnum": 5175
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 141,
              "pos_bol": 5000,
              "pos_cnum": 5005
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 148,
              "pos_bol": 5168,
              "pos_cnum": 5175
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 140,
            "pos_bol": 4980,
            "pos_cnum": 4980
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 148,
            "pos_bol": 5168,
            "pos_cnum": 5175
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 140,
        "pos_bol": 4980,
        "pos_cnum": 4980
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 148,
        "pos_bol": 5168,
        "pos_cnum": 5175
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 151,
              "pos_bol": 5249,
              "pos_cnum": 5253
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 151,
              "pos_bol": 5249,
              "pos_cnum": 5256
            },
            "loc_ghost": false
          },
          "txt2": "mem"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 151,
                        "pos_bol": 5249,
                        "pos_cnum": 5260
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 151,
                        "pos_bol": 5249,
                        "pos_cnum": 5262
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 151,
                        "pos_bol": 5249,
                        "pos_cnum": 5264
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 151,
                        "pos_bol": 5249,
                        "pos_cnum": 5266
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 151,
                  "pos_bol": 5249,
                  "pos_cnum": 5259
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 151,
                  "pos_bol": 5249,
                  "pos_cnum": 5269
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "compare" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5282
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5284
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 151,
                              "pos_bol": 5249,
                              "pos_cnum": 5288
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 151,
                              "pos_bol": 5249,
                              "pos_cnum": 5290
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 151,
                              "pos_bol": 5249,
                              "pos_cnum": 5294
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 151,
                              "pos_bol": 5249,
                              "pos_cnum": 5297
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5288
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5297
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 151,
                      "pos_bol": 5249,
                      "pos_cnum": 5282
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 151,
                      "pos_bol": 5249,
                      "pos_cnum": 5297
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Nolabel" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5302
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5304
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [ "Ptyp_constr", "bool", [] ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5308
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 151,
                          "pos_bol": 5249,
                          "pos_cnum": 5312
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 151,
                      "pos_bol": 5249,
                      "pos_cnum": 5302
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 151,
                      "pos_bol": 5249,
                      "pos_cnum": 5312
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 151,
                  "pos_bol": 5249,
                  "pos_cnum": 5273
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 151,
                  "pos_bol": 5249,
                  "pos_cnum": 5312
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 151,
              "pos_bol": 5249,
              "pos_cnum": 5259
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 151,
              "pos_bol": 5249,
              "pos_cnum": 5312
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " Returns true if key is present in the tree, and false otherwise. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 150,
                              "pos_bol": 5177,
                              "pos_cnum": 5177
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 150,
                              "pos_bol": 5177,
                              "pos_cnum": 5248
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 150,
                          "pos_bol": 5177,
                          "pos_cnum": 5177
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 150,
                          "pos_bol": 5177,
                          "pos_cnum": 5248
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 150,
                      "pos_bol": 5177,
                      "pos_cnum": 5177
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 150,
                      "pos_bol": 5177,
                      "pos_cnum": 5248
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 150,
                "pos_bol": 5177,
                "pos_cnum": 5177
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 150,
                "pos_bol": 5177,
                "pos_cnum": 5248
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 151,
            "pos_bol": 5249,
            "pos_cnum": 5249
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 151,
            "pos_bol": 5249,
            "pos_cnum": 5312
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 151,
        "pos_bol": 5249,
        "pos_cnum": 5249
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 151,
        "pos_bol": 5249,
        "pos_cnum": 5312
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 156,
              "pos_bol": 5568,
              "pos_cnum": 5572
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 156,
              "pos_bol": 5568,
              "pos_cnum": 5578
            },
            "loc_ghost": false
          },
          "txt2": "remove"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 157,
                        "pos_bol": 5579,
                        "pos_cnum": 5585
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 157,
                        "pos_bol": 5579,
                        "pos_cnum": 5587
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 157,
                        "pos_bol": 5579,
                        "pos_cnum": 5589
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 157,
                        "pos_bol": 5579,
                        "pos_cnum": 5591
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 157,
                  "pos_bol": 5579,
                  "pos_cnum": 5584
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 157,
                  "pos_bol": 5579,
                  "pos_cnum": 5594
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "removed" ],
                {
                  "ptyp_desc": [
                    "Ptyp_constr",
                    "ref",
                    [
                      {
                        "ptyp_desc": [ "Ptyp_constr", "bool", [] ],
                        "ptyp_loc": {
                          "loc_start": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 158,
                            "pos_bol": 5595,
                            "pos_cnum": 5608
                          },
                          "loc_end": {
                            "pos_fname": "./_opam/lib/base/avltree.mli",
                            "pos_lnum": 158,
                            "pos_bol": 5595,
                            "pos_cnum": 5612
                          },
                          "loc_ghost": false
                        },
                        "ptyp_loc_stack": [],
                        "ptyp_attributes": []
                      }
                    ]
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 158,
                      "pos_bol": 5595,
                      "pos_cnum": 5608
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 158,
                      "pos_bol": 5595,
                      "pos_cnum": 5616
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Labelled", "compare" ],
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 159,
                              "pos_bol": 5617,
                              "pos_cnum": 5631
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 159,
                              "pos_bol": 5617,
                              "pos_cnum": 5633
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Nolabel" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "k" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 159,
                                  "pos_bol": 5617,
                                  "pos_cnum": 5637
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 159,
                                  "pos_bol": 5617,
                                  "pos_cnum": 5639
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [ "Ptyp_constr", "int", [] ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 159,
                                  "pos_bol": 5617,
                                  "pos_cnum": 5643
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 159,
                                  "pos_bol": 5617,
                                  "pos_cnum": 5646
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 159,
                              "pos_bol": 5617,
                              "pos_cnum": 5637
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 159,
                              "pos_bol": 5617,
                              "pos_cnum": 5646
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 159,
                          "pos_bol": 5617,
                          "pos_cnum": 5631
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 159,
                          "pos_bol": 5617,
                          "pos_cnum": 5646
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Nolabel" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 160,
                              "pos_bol": 5648,
                              "pos_cnum": 5653
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 160,
                              "pos_bol": 5648,
                              "pos_cnum": 5655
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_constr",
                            "t",
                            [
                              {
                                "ptyp_desc": [ "Ptyp_var", "k" ],
                                "ptyp_loc": {
                                  "loc_start": {
                                    "pos_fname": "./_opam/lib/base/avltree.mli",
                                    "pos_lnum": 161,
                                    "pos_bol": 5656,
                                    "pos_cnum": 5662
                                  },
                                  "loc_end": {
                                    "pos_fname": "./_opam/lib/base/avltree.mli",
                                    "pos_lnum": 161,
                                    "pos_bol": 5656,
                                    "pos_cnum": 5664
                                  },
                                  "loc_ghost": false
                                },
                                "ptyp_loc_stack": [],
                                "ptyp_attributes": []
                              },
                              {
                                "ptyp_desc": [ "Ptyp_var", "v" ],
                                "ptyp_loc": {
                                  "loc_start": {
                                    "pos_fname": "./_opam/lib/base/avltree.mli",
                                    "pos_lnum": 161,
                                    "pos_bol": 5656,
                                    "pos_cnum": 5666
                                  },
                                  "loc_end": {
                                    "pos_fname": "./_opam/lib/base/avltree.mli",
                                    "pos_lnum": 161,
                                    "pos_bol": 5656,
                                    "pos_cnum": 5668
                                  },
                                  "loc_ghost": false
                                },
                                "ptyp_loc_stack": [],
                                "ptyp_attributes": []
                              }
                            ]
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 161,
                              "pos_bol": 5656,
                              "pos_cnum": 5661
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 161,
                              "pos_bol": 5656,
                              "pos_cnum": 5671
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 160,
                          "pos_bol": 5648,
                          "pos_cnum": 5653
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 161,
                          "pos_bol": 5656,
                          "pos_cnum": 5671
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 159,
                      "pos_bol": 5617,
                      "pos_cnum": 5622
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 161,
                      "pos_bol": 5656,
                      "pos_cnum": 5671
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 158,
                  "pos_bol": 5595,
                  "pos_cnum": 5600
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 161,
                  "pos_bol": 5656,
                  "pos_cnum": 5671
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 157,
              "pos_bol": 5579,
              "pos_cnum": 5584
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 161,
              "pos_bol": 5656,
              "pos_cnum": 5671
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " Removes key destructively from the tree if it exists, returning the new root node.\n    Previous root nodes are not usable anymore; do so at your peril. The [removed] ref\n    will be set to true if a node was actually removed, and false otherwise. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 153,
                              "pos_bol": 5314,
                              "pos_cnum": 5314
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 155,
                              "pos_bol": 5488,
                              "pos_cnum": 5567
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 153,
                          "pos_bol": 5314,
                          "pos_cnum": 5314
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 155,
                          "pos_bol": 5488,
                          "pos_cnum": 5567
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 153,
                      "pos_bol": 5314,
                      "pos_cnum": 5314
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 155,
                      "pos_bol": 5488,
                      "pos_cnum": 5567
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 153,
                "pos_bol": 5314,
                "pos_cnum": 5314
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 155,
                "pos_bol": 5488,
                "pos_cnum": 5567
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 156,
            "pos_bol": 5568,
            "pos_cnum": 5568
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 161,
            "pos_bol": 5656,
            "pos_cnum": 5671
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 156,
        "pos_bol": 5568,
        "pos_cnum": 5568
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 161,
        "pos_bol": 5656,
        "pos_cnum": 5671
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 164,
              "pos_bol": 5701,
              "pos_cnum": 5705
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 164,
              "pos_bol": 5701,
              "pos_cnum": 5709
            },
            "loc_ghost": false
          },
          "txt2": "fold"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 164,
                        "pos_bol": 5701,
                        "pos_cnum": 5713
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 164,
                        "pos_bol": 5701,
                        "pos_cnum": 5715
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 164,
                        "pos_bol": 5701,
                        "pos_cnum": 5717
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 164,
                        "pos_bol": 5701,
                        "pos_cnum": 5719
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 164,
                  "pos_bol": 5701,
                  "pos_cnum": 5712
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 164,
                  "pos_bol": 5701,
                  "pos_cnum": 5722
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "init" ],
                {
                  "ptyp_desc": [ "Ptyp_var", "acc" ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 164,
                      "pos_bol": 5701,
                      "pos_cnum": 5731
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 164,
                      "pos_bol": 5701,
                      "pos_cnum": 5735
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Labelled", "f" ],
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "key" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "k" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 164,
                              "pos_bol": 5701,
                              "pos_cnum": 5746
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 164,
                              "pos_bol": 5701,
                              "pos_cnum": 5748
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [
                            "Ptyp_arrow",
                            [ "Labelled", "data" ],
                            {
                              "ptyp_desc": [ "Ptyp_var", "v" ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 164,
                                  "pos_bol": 5701,
                                  "pos_cnum": 5757
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 164,
                                  "pos_bol": 5701,
                                  "pos_cnum": 5759
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            },
                            {
                              "ptyp_desc": [
                                "Ptyp_arrow",
                                [ "Nolabel" ],
                                {
                                  "ptyp_desc": [ "Ptyp_var", "acc" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 164,
                                      "pos_bol": 5701,
                                      "pos_cnum": 5763
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 164,
                                      "pos_bol": 5701,
                                      "pos_cnum": 5767
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                },
                                {
                                  "ptyp_desc": [ "Ptyp_var", "acc" ],
                                  "ptyp_loc": {
                                    "loc_start": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 164,
                                      "pos_bol": 5701,
                                      "pos_cnum": 5771
                                    },
                                    "loc_end": {
                                      "pos_fname": "./_opam/lib/base/avltree.mli",
                                      "pos_lnum": 164,
                                      "pos_bol": 5701,
                                      "pos_cnum": 5775
                                    },
                                    "loc_ghost": false
                                  },
                                  "ptyp_loc_stack": [],
                                  "ptyp_attributes": []
                                }
                              ],
                              "ptyp_loc": {
                                "loc_start": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 164,
                                  "pos_bol": 5701,
                                  "pos_cnum": 5763
                                },
                                "loc_end": {
                                  "pos_fname": "./_opam/lib/base/avltree.mli",
                                  "pos_lnum": 164,
                                  "pos_bol": 5701,
                                  "pos_cnum": 5775
                                },
                                "loc_ghost": false
                              },
                              "ptyp_loc_stack": [],
                              "ptyp_attributes": []
                            }
                          ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 164,
                              "pos_bol": 5701,
                              "pos_cnum": 5752
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 164,
                              "pos_bol": 5701,
                              "pos_cnum": 5775
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 164,
                          "pos_bol": 5701,
                          "pos_cnum": 5742
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 164,
                          "pos_bol": 5701,
                          "pos_cnum": 5775
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [ "Ptyp_var", "acc" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 164,
                          "pos_bol": 5701,
                          "pos_cnum": 5780
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 164,
                          "pos_bol": 5701,
                          "pos_cnum": 5784
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 164,
                      "pos_bol": 5701,
                      "pos_cnum": 5739
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 164,
                      "pos_bol": 5701,
                      "pos_cnum": 5784
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 164,
                  "pos_bol": 5701,
                  "pos_cnum": 5726
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 164,
                  "pos_bol": 5701,
                  "pos_cnum": 5784
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 164,
              "pos_bol": 5701,
              "pos_cnum": 5712
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 164,
              "pos_bol": 5701,
              "pos_cnum": 5784
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " Folds over the tree. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 163,
                              "pos_bol": 5673,
                              "pos_cnum": 5673
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 163,
                              "pos_bol": 5673,
                              "pos_cnum": 5700
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 163,
                          "pos_bol": 5673,
                          "pos_cnum": 5673
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 163,
                          "pos_bol": 5673,
                          "pos_cnum": 5700
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 163,
                      "pos_bol": 5673,
                      "pos_cnum": 5673
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 163,
                      "pos_bol": 5673,
                      "pos_cnum": 5700
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 163,
                "pos_bol": 5673,
                "pos_cnum": 5673
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 163,
                "pos_bol": 5673,
                "pos_cnum": 5700
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 164,
            "pos_bol": 5701,
            "pos_cnum": 5701
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 164,
            "pos_bol": 5701,
            "pos_cnum": 5784
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 164,
        "pos_bol": 5701,
        "pos_cnum": 5701
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 164,
        "pos_bol": 5701,
        "pos_cnum": 5784
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 167,
              "pos_bol": 5817,
              "pos_cnum": 5821
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 167,
              "pos_bol": 5817,
              "pos_cnum": 5825
            },
            "loc_ghost": false
          },
          "txt2": "iter"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 167,
                        "pos_bol": 5817,
                        "pos_cnum": 5829
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 167,
                        "pos_bol": 5817,
                        "pos_cnum": 5831
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 167,
                        "pos_bol": 5817,
                        "pos_cnum": 5833
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 167,
                        "pos_bol": 5817,
                        "pos_cnum": 5835
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 167,
                  "pos_bol": 5817,
                  "pos_cnum": 5828
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 167,
                  "pos_bol": 5817,
                  "pos_cnum": 5838
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "f" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Labelled", "key" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 167,
                          "pos_bol": 5817,
                          "pos_cnum": 5849
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 167,
                          "pos_bol": 5817,
                          "pos_cnum": 5851
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "data" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "v" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 167,
                              "pos_bol": 5817,
                              "pos_cnum": 5860
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 167,
                              "pos_bol": 5817,
                              "pos_cnum": 5862
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_constr", "unit", [] ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 167,
                              "pos_bol": 5817,
                              "pos_cnum": 5866
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 167,
                              "pos_bol": 5817,
                              "pos_cnum": 5870
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 167,
                          "pos_bol": 5817,
                          "pos_cnum": 5855
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 167,
                          "pos_bol": 5817,
                          "pos_cnum": 5870
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 167,
                      "pos_bol": 5817,
                      "pos_cnum": 5845
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 167,
                      "pos_bol": 5817,
                      "pos_cnum": 5870
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [ "Ptyp_constr", "unit", [] ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 167,
                      "pos_bol": 5817,
                      "pos_cnum": 5875
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 167,
                      "pos_bol": 5817,
                      "pos_cnum": 5879
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 167,
                  "pos_bol": 5817,
                  "pos_cnum": 5842
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 167,
                  "pos_bol": 5817,
                  "pos_cnum": 5879
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 167,
              "pos_bol": 5817,
              "pos_cnum": 5828
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 167,
              "pos_bol": 5817,
              "pos_cnum": 5879
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " Iterates over the tree. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 166,
                              "pos_bol": 5786,
                              "pos_cnum": 5786
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 166,
                              "pos_bol": 5786,
                              "pos_cnum": 5816
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 166,
                          "pos_bol": 5786,
                          "pos_cnum": 5786
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 166,
                          "pos_bol": 5786,
                          "pos_cnum": 5816
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 166,
                      "pos_bol": 5786,
                      "pos_cnum": 5786
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 166,
                      "pos_bol": 5786,
                      "pos_cnum": 5816
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 166,
                "pos_bol": 5786,
                "pos_cnum": 5786
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 166,
                "pos_bol": 5786,
                "pos_cnum": 5816
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 167,
            "pos_bol": 5817,
            "pos_cnum": 5817
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 167,
            "pos_bol": 5817,
            "pos_cnum": 5879
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 167,
        "pos_bol": 5817,
        "pos_cnum": 5817
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 167,
        "pos_bol": 5817,
        "pos_cnum": 5879
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 170,
              "pos_bol": 5939,
              "pos_cnum": 5943
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 170,
              "pos_bol": 5939,
              "pos_cnum": 5955
            },
            "loc_ghost": false
          },
          "txt2": "mapi_inplace"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 170,
                        "pos_bol": 5939,
                        "pos_cnum": 5959
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 170,
                        "pos_bol": 5939,
                        "pos_cnum": 5961
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 170,
                        "pos_bol": 5939,
                        "pos_cnum": 5963
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 170,
                        "pos_bol": 5939,
                        "pos_cnum": 5965
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 170,
                  "pos_bol": 5939,
                  "pos_cnum": 5958
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 170,
                  "pos_bol": 5939,
                  "pos_cnum": 5968
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_arrow",
                [ "Labelled", "f" ],
                {
                  "ptyp_desc": [
                    "Ptyp_arrow",
                    [ "Labelled", "key" ],
                    {
                      "ptyp_desc": [ "Ptyp_var", "k" ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 170,
                          "pos_bol": 5939,
                          "pos_cnum": 5979
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 170,
                          "pos_bol": 5939,
                          "pos_cnum": 5981
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    },
                    {
                      "ptyp_desc": [
                        "Ptyp_arrow",
                        [ "Labelled", "data" ],
                        {
                          "ptyp_desc": [ "Ptyp_var", "v" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 170,
                              "pos_bol": 5939,
                              "pos_cnum": 5990
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 170,
                              "pos_bol": 5939,
                              "pos_cnum": 5992
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        },
                        {
                          "ptyp_desc": [ "Ptyp_var", "v" ],
                          "ptyp_loc": {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 170,
                              "pos_bol": 5939,
                              "pos_cnum": 5996
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 170,
                              "pos_bol": 5939,
                              "pos_cnum": 5998
                            },
                            "loc_ghost": false
                          },
                          "ptyp_loc_stack": [],
                          "ptyp_attributes": []
                        }
                      ],
                      "ptyp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 170,
                          "pos_bol": 5939,
                          "pos_cnum": 5985
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 170,
                          "pos_bol": 5939,
                          "pos_cnum": 5998
                        },
                        "loc_ghost": false
                      },
                      "ptyp_loc_stack": [],
                      "ptyp_attributes": []
                    }
                  ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 170,
                      "pos_bol": 5939,
                      "pos_cnum": 5975
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 170,
                      "pos_bol": 5939,
                      "pos_cnum": 5998
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                },
                {
                  "ptyp_desc": [ "Ptyp_constr", "unit", [] ],
                  "ptyp_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 170,
                      "pos_bol": 5939,
                      "pos_cnum": 6003
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 170,
                      "pos_bol": 5939,
                      "pos_cnum": 6007
                    },
                    "loc_ghost": false
                  },
                  "ptyp_loc_stack": [],
                  "ptyp_attributes": []
                }
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 170,
                  "pos_bol": 5939,
                  "pos_cnum": 5972
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 170,
                  "pos_bol": 5939,
                  "pos_cnum": 6007
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 170,
              "pos_bol": 5939,
              "pos_cnum": 5958
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 170,
              "pos_bol": 5939,
              "pos_cnum": 6007
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [
          {
            "attr_name": {
              "loc2": {
                "loc_start": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_end": {
                  "pos_fname": "_none_",
                  "pos_lnum": 0,
                  "pos_bol": 0,
                  "pos_cnum": -1
                },
                "loc_ghost": true
              },
              "txt2": "ocaml.doc"
            },
            "attr_payload": [
              "PStr",
              [
                {
                  "pstr_desc": [
                    "Pstr_eval",
                    {
                      "pexp_desc": [
                        "Pexp_constant",
                        [
                          "Pconst_string",
                          " Map over the the tree, changing the data in place. ",
                          {
                            "loc_start": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 169,
                              "pos_bol": 5881,
                              "pos_cnum": 5881
                            },
                            "loc_end": {
                              "pos_fname": "./_opam/lib/base/avltree.mli",
                              "pos_lnum": 169,
                              "pos_bol": 5881,
                              "pos_cnum": 5938
                            },
                            "loc_ghost": false
                          },
                          null
                        ]
                      ],
                      "pexp_loc": {
                        "loc_start": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 169,
                          "pos_bol": 5881,
                          "pos_cnum": 5881
                        },
                        "loc_end": {
                          "pos_fname": "./_opam/lib/base/avltree.mli",
                          "pos_lnum": 169,
                          "pos_bol": 5881,
                          "pos_cnum": 5938
                        },
                        "loc_ghost": false
                      },
                      "pexp_loc_stack": [],
                      "pexp_attributes": []
                    },
                    []
                  ],
                  "pstr_loc": {
                    "loc_start": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 169,
                      "pos_bol": 5881,
                      "pos_cnum": 5881
                    },
                    "loc_end": {
                      "pos_fname": "./_opam/lib/base/avltree.mli",
                      "pos_lnum": 169,
                      "pos_bol": 5881,
                      "pos_cnum": 5938
                    },
                    "loc_ghost": false
                  }
                }
              ]
            ],
            "attr_loc": {
              "loc_start": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 169,
                "pos_bol": 5881,
                "pos_cnum": 5881
              },
              "loc_end": {
                "pos_fname": "./_opam/lib/base/avltree.mli",
                "pos_lnum": 169,
                "pos_bol": 5881,
                "pos_cnum": 5938
              },
              "loc_ghost": false
            }
          }
        ],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 170,
            "pos_bol": 5939,
            "pos_cnum": 5939
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 170,
            "pos_bol": 5939,
            "pos_cnum": 6007
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 170,
        "pos_bol": 5939,
        "pos_cnum": 5939
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 170,
        "pos_bol": 5939,
        "pos_cnum": 6007
      },
      "loc_ghost": false
    }
  },
  {
    "psig_desc": [
      "Psig_value",
      {
        "pval_name": {
          "loc2": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 172,
              "pos_bol": 6009,
              "pos_cnum": 6013
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 172,
              "pos_bol": 6009,
              "pos_cnum": 6023
            },
            "loc_ghost": false
          },
          "txt2": "choose_exn"
        },
        "pval_type": {
          "ptyp_desc": [
            "Ptyp_arrow",
            [ "Nolabel" ],
            {
              "ptyp_desc": [
                "Ptyp_constr",
                "t",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6027
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6029
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6031
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6033
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 172,
                  "pos_bol": 6009,
                  "pos_cnum": 6026
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 172,
                  "pos_bol": 6009,
                  "pos_cnum": 6036
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            },
            {
              "ptyp_desc": [
                "Ptyp_tuple",
                [
                  {
                    "ptyp_desc": [ "Ptyp_var", "k" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6040
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6042
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  },
                  {
                    "ptyp_desc": [ "Ptyp_var", "v" ],
                    "ptyp_loc": {
                      "loc_start": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6045
                      },
                      "loc_end": {
                        "pos_fname": "./_opam/lib/base/avltree.mli",
                        "pos_lnum": 172,
                        "pos_bol": 6009,
                        "pos_cnum": 6047
                      },
                      "loc_ghost": false
                    },
                    "ptyp_loc_stack": [],
                    "ptyp_attributes": []
                  }
                ]
              ],
              "ptyp_loc": {
                "loc_start": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 172,
                  "pos_bol": 6009,
                  "pos_cnum": 6040
                },
                "loc_end": {
                  "pos_fname": "./_opam/lib/base/avltree.mli",
                  "pos_lnum": 172,
                  "pos_bol": 6009,
                  "pos_cnum": 6047
                },
                "loc_ghost": false
              },
              "ptyp_loc_stack": [],
              "ptyp_attributes": []
            }
          ],
          "ptyp_loc": {
            "loc_start": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 172,
              "pos_bol": 6009,
              "pos_cnum": 6026
            },
            "loc_end": {
              "pos_fname": "./_opam/lib/base/avltree.mli",
              "pos_lnum": 172,
              "pos_bol": 6009,
              "pos_cnum": 6047
            },
            "loc_ghost": false
          },
          "ptyp_loc_stack": [],
          "ptyp_attributes": []
        },
        "pval_prim": [],
        "pval_attributes": [],
        "pval_loc": {
          "loc_start": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 172,
            "pos_bol": 6009,
            "pos_cnum": 6009
          },
          "loc_end": {
            "pos_fname": "./_opam/lib/base/avltree.mli",
            "pos_lnum": 172,
            "pos_bol": 6009,
            "pos_cnum": 6047
          },
          "loc_ghost": false
        }
      }
    ],
    "psig_loc": {
      "loc_start": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 172,
        "pos_bol": 6009,
        "pos_cnum": 6009
      },
      "loc_end": {
        "pos_fname": "./_opam/lib/base/avltree.mli",
        "pos_lnum": 172,
        "pos_bol": 6009,
        "pos_cnum": 6047
      },
      "loc_ghost": false
    }
  }
]