{
  "type": "Script",
  "span": {
    "start": 1,
    "end": 140,
    "ctxt": 0
  },
  "body": [
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 1,
        "end": 41,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 11,
          "end": 14,
          "ctxt": 0
        },
        "value": "Foo",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 15,
          "end": 41,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsCallSignatureDeclaration",
            "span": {
              "start": 21,
              "end": 39,
              "ctxt": 0
            },
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 23,
                "end": 38,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeLiteral",
                "span": {
                  "start": 25,
                  "end": 38,
                  "ctxt": 0
                },
                "members": [
                  {
                    "type": "TsPropertySignature",
                    "span": {
                      "start": 27,
                      "end": 36,
                      "ctxt": 0
                    },
                    "readonly": false,
                    "key": {
                      "type": "Identifier",
                      "span": {
                        "start": 27,
                        "end": 28,
                        "ctxt": 0
                      },
                      "value": "a",
                      "optional": false
                    },
                    "computed": false,
                    "optional": false,
                    "init": null,
                    "params": [],
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 28,
                        "end": 36,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsKeywordType",
                        "span": {
                          "start": 30,
                          "end": 36,
                          "ctxt": 0
                        },
                        "kind": "number"
                      }
                    },
                    "typeParams": null
                  }
                ]
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 43,
        "end": 110,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 53,
          "end": 60,
          "ctxt": 0
        },
        "value": "Derived",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [
        {
          "type": "TsExpressionWithTypeArguments",
          "span": {
            "start": 69,
            "end": 72,
            "ctxt": 0
          },
          "expression": {
            "type": "Identifier",
            "span": {
              "start": 69,
              "end": 72,
              "ctxt": 0
            },
            "value": "Foo",
            "optional": false
          },
          "typeArguments": null
        }
      ],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 73,
          "end": 110,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsCallSignatureDeclaration",
            "span": {
              "start": 79,
              "end": 108,
              "ctxt": 0
            },
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 81,
                "end": 107,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeLiteral",
                "span": {
                  "start": 83,
                  "end": 107,
                  "ctxt": 0
                },
                "members": [
                  {
                    "type": "TsPropertySignature",
                    "span": {
                      "start": 85,
                      "end": 95,
                      "ctxt": 0
                    },
                    "readonly": false,
                    "key": {
                      "type": "Identifier",
                      "span": {
                        "start": 85,
                        "end": 86,
                        "ctxt": 0
                      },
                      "value": "a",
                      "optional": false
                    },
                    "computed": false,
                    "optional": false,
                    "init": null,
                    "params": [],
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 86,
                        "end": 94,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsKeywordType",
                        "span": {
                          "start": 88,
                          "end": 94,
                          "ctxt": 0
                        },
                        "kind": "number"
                      }
                    },
                    "typeParams": null
                  },
                  {
                    "type": "TsPropertySignature",
                    "span": {
                      "start": 96,
                      "end": 105,
                      "ctxt": 0
                    },
                    "readonly": false,
                    "key": {
                      "type": "Identifier",
                      "span": {
                        "start": 96,
                        "end": 97,
                        "ctxt": 0
                      },
                      "value": "b",
                      "optional": false
                    },
                    "computed": false,
                    "optional": false,
                    "init": null,
                    "params": [],
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 97,
                        "end": 105,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsKeywordType",
                        "span": {
                          "start": 99,
                          "end": 105,
                          "ctxt": 0
                        },
                        "kind": "number"
                      }
                    },
                    "typeParams": null
                  }
                ]
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 112,
        "end": 127,
        "ctxt": 0
      },
      "kind": "var",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 116,
            "end": 126,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 116,
              "end": 117,
              "ctxt": 0
            },
            "value": "d",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 117,
                "end": 126,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 119,
                  "end": 126,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 119,
                    "end": 126,
                    "ctxt": 0
                  },
                  "value": "Derived",
                  "optional": false
                },
                "typeParams": null
              }
            }
          },
          "init": null,
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 128,
        "end": 140,
        "ctxt": 0
      },
      "kind": "var",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 132,
            "end": 139,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 132,
              "end": 133,
              "ctxt": 0
            },
            "value": "r",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 136,
              "end": 139,
              "ctxt": 0
            },
            "callee": {
              "type": "Identifier",
              "span": {
                "start": 136,
                "end": 137,
                "ctxt": 0
              },
              "value": "d",
              "optional": false
            },
            "arguments": [],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    }
  ],
  "interpreter": null
}