{
  "type": "File",
  "start": 0,
  "end": 27,
  "loc": {
    "start": {
      "line": 1,
      "column": 0
    },
    "end": {
      "line": 1,
      "column": 27
    }
  },
  "range": [
    0,
    27
  ],
  "program": {
    "type": "Program",
    "start": 0,
    "end": 27,
    "loc": {
      "start": {
        "line": 1,
        "column": 0
      },
      "end": {
        "line": 1,
        "column": 27
      }
    },
    "range": [
      0,
      27
    ],
    "sourceType": "module",
    "body": [
      {
        "type": "InterfaceDeclaration",
        "start": 0,
        "end": 27,
        "loc": {
          "start": {
            "line": 1,
            "column": 0
          },
          "end": {
            "line": 1,
            "column": 27
          }
        },
        "range": [
          0,
          27
        ],
        "id": {
          "type": "Identifier",
          "start": 10,
          "end": 11,
          "loc": {
            "start": {
              "line": 1,
              "column": 10
            },
            "end": {
              "line": 1,
              "column": 11
            }
          },
          "range": [
            10,
            11
          ],
          "name": "A"
        },
        "typeParameters": null,
        "extends": [],
        "body": {
          "type": "ObjectTypeAnnotation",
          "start": 12,
          "end": 27,
          "loc": {
            "start": {
              "line": 1,
              "column": 12
            },
            "end": {
              "line": 1,
              "column": 27
            }
          },
          "range": [
            12,
            27
          ],
          "callProperties": [
            {
              "type": "ObjectTypeCallProperty",
              "start": 14,
              "end": 25,
              "loc": {
                "start": {
                  "line": 1,
                  "column": 14
                },
                "end": {
                  "line": 1,
                  "column": 25
                }
              },
              "range": [
                14,
                25
              ],
              "static": false,
              "value": {
                "type": "FunctionTypeAnnotation",
                "start": 14,
                "end": 24,
                "loc": {
                  "start": {
                    "line": 1,
                    "column": 14
                  },
                  "end": {
                    "line": 1,
                    "column": 24
                  }
                },
                "range": [
                  14,
                  24
                ],
                "params": [],
                "rest": null,
                "typeParameters": null,
                "returnType": {
                  "type": "NumberTypeAnnotation",
                  "start": 18,
                  "end": 24,
                  "loc": {
                    "start": {
                      "line": 1,
                      "column": 18
                    },
                    "end": {
                      "line": 1,
                      "column": 24
                    }
                  },
                  "range": [
                    18,
                    24
                  ]
                }
              }
            }
          ],
          "properties": [],
          "indexers": []
        }
      }
    ]
  }
}