{
  "type": "File",
  "start": 0,
  "end": 55,
  "loc": {
    "start": {
      "line": 1,
      "column": 0
    },
    "end": {
      "line": 1,
      "column": 55
    }
  },
  "range": [
    0,
    55
  ],
  "program": {
    "type": "Program",
    "start": 0,
    "end": 55,
    "loc": {
      "start": {
        "line": 1,
        "column": 0
      },
      "end": {
        "line": 1,
        "column": 55
      }
    },
    "range": [
      0,
      55
    ],
    "sourceType": "module",
    "body": [
      {
        "type": "DeclareModule",
        "start": 0,
        "end": 55,
        "loc": {
          "start": {
            "line": 1,
            "column": 0
          },
          "end": {
            "line": 1,
            "column": 55
          }
        },
        "range": [
          0,
          55
        ],
        "id": {
          "type": "Identifier",
          "start": 15,
          "end": 16,
          "loc": {
            "start": {
              "line": 1,
              "column": 15
            },
            "end": {
              "line": 1,
              "column": 16
            }
          },
          "range": [
            15,
            16
          ],
          "name": "A"
        },
        "body": {
          "type": "BlockStatement",
          "start": 17,
          "end": 55,
          "loc": {
            "start": {
              "line": 1,
              "column": 17
            },
            "end": {
              "line": 1,
              "column": 55
            }
          },
          "range": [
            17,
            55
          ],
          "body": [
            {
              "type": "DeclareClass",
              "start": 19,
              "end": 53,
              "loc": {
                "start": {
                  "line": 1,
                  "column": 19
                },
                "end": {
                  "line": 1,
                  "column": 53
                }
              },
              "range": [
                19,
                53
              ],
              "id": {
                "type": "Identifier",
                "start": 33,
                "end": 34,
                "loc": {
                  "start": {
                    "line": 1,
                    "column": 33
                  },
                  "end": {
                    "line": 1,
                    "column": 34
                  }
                },
                "range": [
                  33,
                  34
                ],
                "name": "B"
              },
              "typeParameters": null,
              "extends": [],
              "body": {
                "type": "ObjectTypeAnnotation",
                "start": 35,
                "end": 53,
                "loc": {
                  "start": {
                    "line": 1,
                    "column": 35
                  },
                  "end": {
                    "line": 1,
                    "column": 53
                  }
                },
                "range": [
                  35,
                  53
                ],
                "callProperties": [],
                "properties": [
                  {
                    "type": "ObjectTypeProperty",
                    "start": 37,
                    "end": 51,
                    "loc": {
                      "start": {
                        "line": 1,
                        "column": 37
                      },
                      "end": {
                        "line": 1,
                        "column": 51
                      }
                    },
                    "range": [
                      37,
                      51
                    ],
                    "value": {
                      "type": "FunctionTypeAnnotation",
                      "start": 37,
                      "end": 50,
                      "loc": {
                        "start": {
                          "line": 1,
                          "column": 37
                        },
                        "end": {
                          "line": 1,
                          "column": 50
                        }
                      },
                      "range": [
                        37,
                        50
                      ],
                      "params": [],
                      "rest": null,
                      "typeParameters": null,
                      "returnType": {
                        "type": "NumberTypeAnnotation",
                        "start": 44,
                        "end": 50,
                        "loc": {
                          "start": {
                            "line": 1,
                            "column": 44
                          },
                          "end": {
                            "line": 1,
                            "column": 50
                          }
                        },
                        "range": [
                          44,
                          50
                        ]
                      }
                    },
                    "key": {
                      "type": "Identifier",
                      "start": 37,
                      "end": 40,
                      "loc": {
                        "start": {
                          "line": 1,
                          "column": 37
                        },
                        "end": {
                          "line": 1,
                          "column": 40
                        }
                      },
                      "range": [
                        37,
                        40
                      ],
                      "name": "foo"
                    },
                    "optional": false
                  }
                ],
                "indexers": []
              }
            }
          ]
        }
      }
    ]
  }
}