{
  "type": "File",
  "start":0,"end":60,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":1}},
  "program": {
    "type": "Program",
    "start":0,"end":60,"loc":{"start":{"line":1,"column":0},"end":{"line":5,"column":1}},
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "TypeAlias",
        "start":10,"end":60,"loc":{"start":{"line":3,"column":0},"end":{"line":5,"column":1}},
        "leadingComments": [
          {
            "type": "CommentLine",
            "value": " @flow",
            "start":0,"end":8,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":8}}
          }
        ],
        "id": {
          "type": "Identifier",
          "start":15,"end":16,"loc":{"start":{"line":3,"column":5},"end":{"line":3,"column":6},"identifierName":"T"},
          "name": "T"
        },
        "typeParameters": null,
        "right": {
          "type": "ObjectTypeAnnotation",
          "start":19,"end":60,"loc":{"start":{"line":3,"column":9},"end":{"line":5,"column":1}},
          "callProperties": [],
          "properties": [
            {
              "type": "ObjectTypeProperty",
              "start":25,"end":58,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":37}},
              "key": {
                "type": "Identifier",
                "start":25,"end":36,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":15},"identifierName":"constructor"},
                "name": "constructor"
              },
              "static": false,
              "proto": false,
              "kind": "init",
              "method": true,
              "value": {
                "type": "FunctionTypeAnnotation",
                "start":25,"end":58,"loc":{"start":{"line":4,"column":4},"end":{"line":4,"column":37}},
                "params": [],
                "rest": null,
                "typeParameters": null,
                "this": {
                  "type": "FunctionTypeParam",
                  "start":37,"end":50,"loc":{"start":{"line":4,"column":16},"end":{"line":4,"column":29}},
                  "name": null,
                  "optional": false,
                  "typeAnnotation": {
                    "type": "NumberTypeAnnotation",
                    "start":44,"end":50,"loc":{"start":{"line":4,"column":23},"end":{"line":4,"column":29}}
                  }
                },
                "returnType": {
                  "type": "VoidTypeAnnotation",
                  "start":54,"end":58,"loc":{"start":{"line":4,"column":33},"end":{"line":4,"column":37}}
                }
              },
              "optional": false
            }
          ],
          "indexers": [],
          "internalSlots": [],
          "exact": false,
          "inexact": false
        }
      }
    ],
    "directives": []
  },
  "comments": [
    {
      "type": "CommentLine",
      "value": " @flow",
      "start":0,"end":8,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":8}}
    }
  ]
}