{
  "type": "Script",
  "span": {
    "start": 75,
    "end": 510,
    "ctxt": 0
  },
  "body": [
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 75,
        "end": 106,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 85,
          "end": 89,
          "ctxt": 0
        },
        "value": "Base",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 90,
          "end": 106,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 92,
              "end": 104,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 92,
                "end": 95,
                "ctxt": 0
              },
              "value": "foo",
              "optional": false
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 95,
                "end": 103,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsKeywordType",
                "span": {
                  "start": 97,
                  "end": 103,
                  "ctxt": 0
                },
                "kind": "string"
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 107,
        "end": 154,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 117,
          "end": 124,
          "ctxt": 0
        },
        "value": "Derived",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [
        {
          "type": "TsExpressionWithTypeArguments",
          "span": {
            "start": 133,
            "end": 137,
            "ctxt": 0
          },
          "expression": {
            "type": "Identifier",
            "span": {
              "start": 133,
              "end": 137,
              "ctxt": 0
            },
            "value": "Base",
            "optional": false
          },
          "typeArguments": null
        }
      ],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 138,
          "end": 154,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 140,
              "end": 152,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 140,
                "end": 143,
                "ctxt": 0
              },
              "value": "bar",
              "optional": false
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 143,
                "end": 151,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsKeywordType",
                "span": {
                  "start": 145,
                  "end": 151,
                  "ctxt": 0
                },
                "kind": "string"
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 156,
        "end": 186,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 166,
          "end": 167,
          "ctxt": 0
        },
        "value": "T",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 168,
          "end": 186,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 174,
              "end": 184,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 174,
                "end": 177,
                "ctxt": 0
              },
              "value": "Foo",
              "optional": false
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 177,
                "end": 183,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 179,
                  "end": 183,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 179,
                    "end": 183,
                    "ctxt": 0
                  },
                  "value": "Base",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 188,
        "end": 240,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 198,
          "end": 199,
          "ctxt": 0
        },
        "value": "S",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [
        {
          "type": "TsExpressionWithTypeArguments",
          "span": {
            "start": 208,
            "end": 209,
            "ctxt": 0
          },
          "expression": {
            "type": "Identifier",
            "span": {
              "start": 208,
              "end": 209,
              "ctxt": 0
            },
            "value": "T",
            "optional": false
          },
          "typeArguments": null
        }
      ],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 210,
          "end": 240,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 216,
              "end": 229,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 216,
                "end": 219,
                "ctxt": 0
              },
              "value": "Foo",
              "optional": false
            },
            "computed": false,
            "optional": true,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 220,
                "end": 229,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 222,
                  "end": 229,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 222,
                    "end": 229,
                    "ctxt": 0
                  },
                  "value": "Derived",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 242,
        "end": 271,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 252,
          "end": 254,
          "ctxt": 0
        },
        "value": "T2",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 255,
          "end": 271,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 261,
              "end": 269,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "NumericLiteral",
              "span": {
                "start": 261,
                "end": 262,
                "ctxt": 0
              },
              "value": 1.0,
              "raw": "1"
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 262,
                "end": 268,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 264,
                  "end": 268,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 264,
                    "end": 268,
                    "ctxt": 0
                  },
                  "value": "Base",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 273,
        "end": 326,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 283,
          "end": 285,
          "ctxt": 0
        },
        "value": "S2",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [
        {
          "type": "TsExpressionWithTypeArguments",
          "span": {
            "start": 294,
            "end": 296,
            "ctxt": 0
          },
          "expression": {
            "type": "Identifier",
            "span": {
              "start": 294,
              "end": 296,
              "ctxt": 0
            },
            "value": "T2",
            "optional": false
          },
          "typeArguments": null
        }
      ],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 297,
          "end": 326,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 303,
              "end": 315,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "NumericLiteral",
              "span": {
                "start": 303,
                "end": 304,
                "ctxt": 0
              },
              "value": 1.0,
              "raw": "1"
            },
            "computed": false,
            "optional": true,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 305,
                "end": 314,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 307,
                  "end": 314,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 307,
                    "end": 314,
                    "ctxt": 0
                  },
                  "value": "Derived",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 328,
        "end": 359,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 338,
          "end": 340,
          "ctxt": 0
        },
        "value": "T3",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 341,
          "end": 359,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 347,
              "end": 357,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "StringLiteral",
              "span": {
                "start": 347,
                "end": 350,
                "ctxt": 0
              },
              "value": "1",
              "raw": "'1'"
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 350,
                "end": 356,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 352,
                  "end": 356,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 352,
                    "end": 356,
                    "ctxt": 0
                  },
                  "value": "Base",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 361,
        "end": 416,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 371,
          "end": 373,
          "ctxt": 0
        },
        "value": "S3",
        "optional": false
      },
      "declare": false,
      "typeParams": null,
      "extends": [
        {
          "type": "TsExpressionWithTypeArguments",
          "span": {
            "start": 382,
            "end": 384,
            "ctxt": 0
          },
          "expression": {
            "type": "Identifier",
            "span": {
              "start": 382,
              "end": 384,
              "ctxt": 0
            },
            "value": "T3",
            "optional": false
          },
          "typeArguments": null
        }
      ],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 385,
          "end": 416,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 391,
              "end": 405,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "StringLiteral",
              "span": {
                "start": 391,
                "end": 394,
                "ctxt": 0
              },
              "value": "1",
              "raw": "'1'"
            },
            "computed": false,
            "optional": true,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 395,
                "end": 404,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 397,
                  "end": 404,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 397,
                    "end": 404,
                    "ctxt": 0
                  },
                  "value": "Derived",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 441,
        "end": 462,
        "ctxt": 0
      },
      "kind": "var",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 445,
            "end": 462,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 445,
              "end": 446,
              "ctxt": 0
            },
            "value": "a",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 446,
                "end": 462,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeLiteral",
                "span": {
                  "start": 448,
                  "end": 462,
                  "ctxt": 0
                },
                "members": [
                  {
                    "type": "TsPropertySignature",
                    "span": {
                      "start": 450,
                      "end": 460,
                      "ctxt": 0
                    },
                    "readonly": false,
                    "key": {
                      "type": "Identifier",
                      "span": {
                        "start": 450,
                        "end": 453,
                        "ctxt": 0
                      },
                      "value": "Foo",
                      "optional": false
                    },
                    "computed": false,
                    "optional": false,
                    "init": null,
                    "params": [],
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 453,
                        "end": 459,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsTypeReference",
                        "span": {
                          "start": 455,
                          "end": 459,
                          "ctxt": 0
                        },
                        "typeName": {
                          "type": "Identifier",
                          "span": {
                            "start": 455,
                            "end": 459,
                            "ctxt": 0
                          },
                          "value": "Base",
                          "optional": false
                        },
                        "typeParams": null
                      }
                    },
                    "typeParams": null
                  }
                ]
              }
            }
          },
          "init": null,
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 463,
        "end": 488,
        "ctxt": 0
      },
      "kind": "var",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 467,
            "end": 488,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 467,
              "end": 468,
              "ctxt": 0
            },
            "value": "b",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 468,
                "end": 488,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeLiteral",
                "span": {
                  "start": 470,
                  "end": 488,
                  "ctxt": 0
                },
                "members": [
                  {
                    "type": "TsPropertySignature",
                    "span": {
                      "start": 472,
                      "end": 486,
                      "ctxt": 0
                    },
                    "readonly": false,
                    "key": {
                      "type": "Identifier",
                      "span": {
                        "start": 472,
                        "end": 475,
                        "ctxt": 0
                      },
                      "value": "Foo",
                      "optional": false
                    },
                    "computed": false,
                    "optional": true,
                    "init": null,
                    "params": [],
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 476,
                        "end": 485,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsTypeReference",
                        "span": {
                          "start": 478,
                          "end": 485,
                          "ctxt": 0
                        },
                        "typeName": {
                          "type": "Identifier",
                          "span": {
                            "start": 478,
                            "end": 485,
                            "ctxt": 0
                          },
                          "value": "Derived",
                          "optional": false
                        },
                        "typeParams": null
                      }
                    },
                    "typeParams": null
                  }
                ]
              }
            }
          },
          "init": null,
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 489,
        "end": 510,
        "ctxt": 0
      },
      "kind": "var",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 493,
            "end": 509,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 493,
              "end": 494,
              "ctxt": 0
            },
            "value": "r",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "ConditionalExpression",
            "span": {
              "start": 497,
              "end": 509,
              "ctxt": 0
            },
            "test": {
              "type": "BooleanLiteral",
              "span": {
                "start": 497,
                "end": 501,
                "ctxt": 0
              },
              "value": true
            },
            "consequent": {
              "type": "Identifier",
              "span": {
                "start": 504,
                "end": 505,
                "ctxt": 0
              },
              "value": "a",
              "optional": false
            },
            "alternate": {
              "type": "Identifier",
              "span": {
                "start": 508,
                "end": 509,
                "ctxt": 0
              },
              "value": "b",
              "optional": false
            }
          },
          "definite": false
        }
      ]
    }
  ],
  "interpreter": null
}