{
  "type": "Script",
  "span": {
    "start": 38,
    "end": 783,
    "ctxt": 0
  },
  "body": [
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 38,
        "end": 52,
        "ctxt": 0
      },
      "kind": "const",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 44,
            "end": 51,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 44,
              "end": 45,
              "ctxt": 0
            },
            "value": "a",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "StringLiteral",
            "span": {
              "start": 48,
              "end": 51,
              "ctxt": 0
            },
            "value": "a",
            "raw": "'a'"
          },
          "definite": false
        }
      ]
    },
    {
      "type": "FunctionDeclaration",
      "identifier": {
        "type": "Identifier",
        "span": {
          "start": 63,
          "end": 65,
          "ctxt": 0
        },
        "value": "f1",
        "optional": false
      },
      "declare": false,
      "params": [
        {
          "type": "Parameter",
          "span": {
            "start": 102,
            "end": 108,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 102,
              "end": 108,
              "ctxt": 0
            },
            "value": "obj",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 105,
                "end": 108,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 107,
                  "end": 108,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 107,
                    "end": 108,
                    "ctxt": 0
                  },
                  "value": "T",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        }
      ],
      "decorators": [],
      "span": {
        "start": 54,
        "end": 313,
        "ctxt": 0
      },
      "body": {
        "type": "BlockStatement",
        "span": {
          "start": 110,
          "end": 313,
          "ctxt": 0
        },
        "stmts": [
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 116,
              "end": 136,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 120,
                  "end": 135,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 120,
                    "end": 129,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 122,
                        "end": 127,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 122,
                        "end": 125,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 125,
                          "end": 127,
                          "ctxt": 0
                        },
                        "value": "r0",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 132,
                    "end": 135,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          },
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 141,
              "end": 168,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 145,
                  "end": 167,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 145,
                    "end": 161,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Identifier",
                        "span": {
                          "start": 147,
                          "end": 148,
                          "ctxt": 0
                        },
                        "value": "a",
                        "optional": false
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 150,
                          "end": 152,
                          "ctxt": 0
                        },
                        "value": "a1",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 154,
                        "end": 159,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 154,
                        "end": 157,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 157,
                          "end": 159,
                          "ctxt": 0
                        },
                        "value": "r1",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 164,
                    "end": 167,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          },
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 173,
              "end": 207,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 177,
                  "end": 206,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 177,
                    "end": 200,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Identifier",
                        "span": {
                          "start": 179,
                          "end": 180,
                          "ctxt": 0
                        },
                        "value": "a",
                        "optional": false
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 182,
                          "end": 184,
                          "ctxt": 0
                        },
                        "value": "a2",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Identifier",
                        "span": {
                          "start": 186,
                          "end": 187,
                          "ctxt": 0
                        },
                        "value": "b",
                        "optional": false
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 189,
                          "end": 191,
                          "ctxt": 0
                        },
                        "value": "b2",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 193,
                        "end": 198,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 193,
                        "end": 196,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 196,
                          "end": 198,
                          "ctxt": 0
                        },
                        "value": "r2",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 203,
                    "end": 206,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          },
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 212,
              "end": 241,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 216,
                  "end": 240,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 216,
                    "end": 234,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "StringLiteral",
                        "span": {
                          "start": 218,
                          "end": 221,
                          "ctxt": 0
                        },
                        "value": "a",
                        "raw": "'a'"
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 223,
                          "end": 225,
                          "ctxt": 0
                        },
                        "value": "a3",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 227,
                        "end": 232,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 227,
                        "end": 230,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 230,
                          "end": 232,
                          "ctxt": 0
                        },
                        "value": "r3",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 237,
                    "end": 240,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          },
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 246,
              "end": 277,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 250,
                  "end": 276,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 250,
                    "end": 270,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 252,
                          "end": 257,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "StringLiteral",
                          "span": {
                            "start": 253,
                            "end": 256,
                            "ctxt": 0
                          },
                          "value": "a",
                          "raw": "'a'"
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 259,
                          "end": 261,
                          "ctxt": 0
                        },
                        "value": "a4",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 263,
                        "end": 268,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 263,
                        "end": 266,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 266,
                          "end": 268,
                          "ctxt": 0
                        },
                        "value": "r4",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 273,
                    "end": 276,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          },
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 282,
              "end": 311,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 286,
                  "end": 310,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 286,
                    "end": 304,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 288,
                          "end": 291,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "Identifier",
                          "span": {
                            "start": 289,
                            "end": 290,
                            "ctxt": 0
                          },
                          "value": "a",
                          "optional": false
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 293,
                          "end": 295,
                          "ctxt": 0
                        },
                        "value": "a5",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 297,
                        "end": 302,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 297,
                        "end": 300,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 300,
                          "end": 302,
                          "ctxt": 0
                        },
                        "value": "r5",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 307,
                    "end": 310,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          }
        ]
      },
      "generator": false,
      "async": false,
      "typeParameters": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 65,
          "end": 101,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 66,
              "end": 100,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 66,
                "end": 67,
                "ctxt": 0
              },
              "value": "T",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": {
              "type": "TsTypeLiteral",
              "span": {
                "start": 76,
                "end": 100,
                "ctxt": 0
              },
              "members": [
                {
                  "type": "TsPropertySignature",
                  "span": {
                    "start": 78,
                    "end": 88,
                    "ctxt": 0
                  },
                  "readonly": false,
                  "key": {
                    "type": "Identifier",
                    "span": {
                      "start": 78,
                      "end": 79,
                      "ctxt": 0
                    },
                    "value": "a",
                    "optional": false
                  },
                  "computed": false,
                  "optional": false,
                  "init": null,
                  "params": [],
                  "typeAnnotation": {
                    "type": "TsTypeAnnotation",
                    "span": {
                      "start": 79,
                      "end": 87,
                      "ctxt": 0
                    },
                    "typeAnnotation": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 81,
                        "end": 87,
                        "ctxt": 0
                      },
                      "kind": "string"
                    }
                  },
                  "typeParams": null
                },
                {
                  "type": "TsPropertySignature",
                  "span": {
                    "start": 89,
                    "end": 98,
                    "ctxt": 0
                  },
                  "readonly": false,
                  "key": {
                    "type": "Identifier",
                    "span": {
                      "start": 89,
                      "end": 90,
                      "ctxt": 0
                    },
                    "value": "b",
                    "optional": false
                  },
                  "computed": false,
                  "optional": false,
                  "init": null,
                  "params": [],
                  "typeAnnotation": {
                    "type": "TsTypeAnnotation",
                    "span": {
                      "start": 90,
                      "end": 98,
                      "ctxt": 0
                    },
                    "typeAnnotation": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 92,
                        "end": 98,
                        "ctxt": 0
                      },
                      "kind": "number"
                    }
                  },
                  "typeParams": null
                }
              ]
            },
            "default": null
          }
        ]
      },
      "returnType": null
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 315,
        "end": 335,
        "ctxt": 0
      },
      "kind": "const",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 321,
            "end": 334,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 321,
              "end": 323,
              "ctxt": 0
            },
            "value": "sa",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 326,
              "end": 334,
              "ctxt": 0
            },
            "callee": {
              "type": "Identifier",
              "span": {
                "start": 326,
                "end": 332,
                "ctxt": 0
              },
              "value": "Symbol",
              "optional": false
            },
            "arguments": [],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 336,
        "end": 356,
        "ctxt": 0
      },
      "kind": "const",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 342,
            "end": 355,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 342,
              "end": 344,
              "ctxt": 0
            },
            "value": "sb",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 347,
              "end": 355,
              "ctxt": 0
            },
            "callee": {
              "type": "Identifier",
              "span": {
                "start": 347,
                "end": 353,
                "ctxt": 0
              },
              "value": "Symbol",
              "optional": false
            },
            "arguments": [],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    },
    {
      "type": "FunctionDeclaration",
      "identifier": {
        "type": "Identifier",
        "span": {
          "start": 367,
          "end": 369,
          "ctxt": 0
        },
        "value": "f2",
        "optional": false
      },
      "declare": false,
      "params": [
        {
          "type": "Parameter",
          "span": {
            "start": 412,
            "end": 418,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 412,
              "end": 418,
              "ctxt": 0
            },
            "value": "obj",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 415,
                "end": 418,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 417,
                  "end": 418,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 417,
                    "end": 418,
                    "ctxt": 0
                  },
                  "value": "T",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        }
      ],
      "decorators": [],
      "span": {
        "start": 358,
        "end": 468,
        "ctxt": 0
      },
      "body": {
        "type": "BlockStatement",
        "span": {
          "start": 420,
          "end": 468,
          "ctxt": 0
        },
        "stmts": [
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 426,
              "end": 466,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 430,
                  "end": 465,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 430,
                    "end": 459,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 432,
                          "end": 436,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "Identifier",
                          "span": {
                            "start": 433,
                            "end": 435,
                            "ctxt": 0
                          },
                          "value": "sa",
                          "optional": false
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 438,
                          "end": 440,
                          "ctxt": 0
                        },
                        "value": "a1",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 442,
                          "end": 446,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "Identifier",
                          "span": {
                            "start": 443,
                            "end": 445,
                            "ctxt": 0
                          },
                          "value": "sb",
                          "optional": false
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 448,
                          "end": 450,
                          "ctxt": 0
                        },
                        "value": "b1",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 452,
                        "end": 457,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 452,
                        "end": 455,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 455,
                          "end": 457,
                          "ctxt": 0
                        },
                        "value": "r1",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 462,
                    "end": 465,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          }
        ]
      },
      "generator": false,
      "async": false,
      "typeParameters": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 369,
          "end": 411,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 370,
              "end": 410,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 370,
                "end": 371,
                "ctxt": 0
              },
              "value": "T",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": {
              "type": "TsTypeLiteral",
              "span": {
                "start": 380,
                "end": 410,
                "ctxt": 0
              },
              "members": [
                {
                  "type": "TsPropertySignature",
                  "span": {
                    "start": 382,
                    "end": 395,
                    "ctxt": 0
                  },
                  "readonly": false,
                  "key": {
                    "type": "Identifier",
                    "span": {
                      "start": 383,
                      "end": 385,
                      "ctxt": 0
                    },
                    "value": "sa",
                    "optional": false
                  },
                  "computed": true,
                  "optional": false,
                  "init": null,
                  "params": [],
                  "typeAnnotation": {
                    "type": "TsTypeAnnotation",
                    "span": {
                      "start": 386,
                      "end": 394,
                      "ctxt": 0
                    },
                    "typeAnnotation": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 388,
                        "end": 394,
                        "ctxt": 0
                      },
                      "kind": "string"
                    }
                  },
                  "typeParams": null
                },
                {
                  "type": "TsPropertySignature",
                  "span": {
                    "start": 396,
                    "end": 408,
                    "ctxt": 0
                  },
                  "readonly": false,
                  "key": {
                    "type": "Identifier",
                    "span": {
                      "start": 397,
                      "end": 399,
                      "ctxt": 0
                    },
                    "value": "sb",
                    "optional": false
                  },
                  "computed": true,
                  "optional": false,
                  "init": null,
                  "params": [],
                  "typeAnnotation": {
                    "type": "TsTypeAnnotation",
                    "span": {
                      "start": 400,
                      "end": 408,
                      "ctxt": 0
                    },
                    "typeAnnotation": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 402,
                        "end": 408,
                        "ctxt": 0
                      },
                      "kind": "number"
                    }
                  },
                  "typeParams": null
                }
              ]
            },
            "default": null
          }
        ]
      },
      "returnType": null
    },
    {
      "type": "FunctionDeclaration",
      "identifier": {
        "type": "Identifier",
        "span": {
          "start": 479,
          "end": 481,
          "ctxt": 0
        },
        "value": "f3",
        "optional": false
      },
      "declare": false,
      "params": [
        {
          "type": "Parameter",
          "span": {
            "start": 525,
            "end": 531,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 525,
              "end": 531,
              "ctxt": 0
            },
            "value": "obj",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 528,
                "end": 531,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 530,
                  "end": 531,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 530,
                    "end": 531,
                    "ctxt": 0
                  },
                  "value": "T",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        },
        {
          "type": "Parameter",
          "span": {
            "start": 533,
            "end": 539,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 533,
              "end": 539,
              "ctxt": 0
            },
            "value": "k1",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 535,
                "end": 539,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 537,
                  "end": 539,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 537,
                    "end": 539,
                    "ctxt": 0
                  },
                  "value": "K1",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        },
        {
          "type": "Parameter",
          "span": {
            "start": 541,
            "end": 547,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 541,
              "end": 547,
              "ctxt": 0
            },
            "value": "k2",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 543,
                "end": 547,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 545,
                  "end": 547,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 545,
                    "end": 547,
                    "ctxt": 0
                  },
                  "value": "K2",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        }
      ],
      "decorators": [],
      "span": {
        "start": 470,
        "end": 597,
        "ctxt": 0
      },
      "body": {
        "type": "BlockStatement",
        "span": {
          "start": 549,
          "end": 597,
          "ctxt": 0
        },
        "stmts": [
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 555,
              "end": 595,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 559,
                  "end": 594,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 559,
                    "end": 588,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 561,
                          "end": 565,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "Identifier",
                          "span": {
                            "start": 562,
                            "end": 564,
                            "ctxt": 0
                          },
                          "value": "k1",
                          "optional": false
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 567,
                          "end": 569,
                          "ctxt": 0
                        },
                        "value": "a1",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 571,
                          "end": 575,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "Identifier",
                          "span": {
                            "start": 572,
                            "end": 574,
                            "ctxt": 0
                          },
                          "value": "k2",
                          "optional": false
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 577,
                          "end": 579,
                          "ctxt": 0
                        },
                        "value": "a2",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 581,
                        "end": 586,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 581,
                        "end": 584,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 584,
                          "end": 586,
                          "ctxt": 0
                        },
                        "value": "r1",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 591,
                    "end": 594,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          }
        ]
      },
      "generator": false,
      "async": false,
      "typeParameters": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 481,
          "end": 524,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 482,
              "end": 483,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 482,
                "end": 483,
                "ctxt": 0
              },
              "value": "T",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": null,
            "default": null
          },
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 485,
              "end": 503,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 485,
                "end": 487,
                "ctxt": 0
              },
              "value": "K1",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": {
              "type": "TsTypeOperator",
              "span": {
                "start": 496,
                "end": 503,
                "ctxt": 0
              },
              "op": "keyof",
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 502,
                  "end": 503,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 502,
                    "end": 503,
                    "ctxt": 0
                  },
                  "value": "T",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "default": null
          },
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 505,
              "end": 523,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 505,
                "end": 507,
                "ctxt": 0
              },
              "value": "K2",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": {
              "type": "TsTypeOperator",
              "span": {
                "start": 516,
                "end": 523,
                "ctxt": 0
              },
              "op": "keyof",
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 522,
                  "end": 523,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 522,
                    "end": 523,
                    "ctxt": 0
                  },
                  "value": "T",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "default": null
          }
        ]
      },
      "returnType": null
    },
    {
      "type": "TsTypeAliasDeclaration",
      "span": {
        "start": 599,
        "end": 648,
        "ctxt": 0
      },
      "declare": false,
      "id": {
        "type": "Identifier",
        "span": {
          "start": 604,
          "end": 608,
          "ctxt": 0
        },
        "value": "Item",
        "optional": false
      },
      "typeParams": null,
      "typeAnnotation": {
        "type": "TsTypeLiteral",
        "span": {
          "start": 611,
          "end": 647,
          "ctxt": 0
        },
        "members": [
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 613,
              "end": 623,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 613,
                "end": 614,
                "ctxt": 0
              },
              "value": "a",
              "optional": false
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 614,
                "end": 622,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsKeywordType",
                "span": {
                  "start": 616,
                  "end": 622,
                  "ctxt": 0
                },
                "kind": "string"
              }
            },
            "typeParams": null
          },
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 624,
              "end": 634,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 624,
                "end": 625,
                "ctxt": 0
              },
              "value": "b",
              "optional": false
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 625,
                "end": 633,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsKeywordType",
                "span": {
                  "start": 627,
                  "end": 633,
                  "ctxt": 0
                },
                "kind": "number"
              }
            },
            "typeParams": null
          },
          {
            "type": "TsPropertySignature",
            "span": {
              "start": 635,
              "end": 645,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 635,
                "end": 636,
                "ctxt": 0
              },
              "value": "c",
              "optional": false
            },
            "computed": false,
            "optional": false,
            "init": null,
            "params": [],
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 636,
                "end": 645,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsKeywordType",
                "span": {
                  "start": 638,
                  "end": 645,
                  "ctxt": 0
                },
                "kind": "boolean"
              }
            },
            "typeParams": null
          }
        ]
      }
    },
    {
      "type": "FunctionDeclaration",
      "identifier": {
        "type": "Identifier",
        "span": {
          "start": 659,
          "end": 661,
          "ctxt": 0
        },
        "value": "f4",
        "optional": false
      },
      "declare": false,
      "params": [
        {
          "type": "Parameter",
          "span": {
            "start": 708,
            "end": 717,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 708,
              "end": 717,
              "ctxt": 0
            },
            "value": "obj",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 711,
                "end": 717,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 713,
                  "end": 717,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 713,
                    "end": 717,
                    "ctxt": 0
                  },
                  "value": "Item",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        },
        {
          "type": "Parameter",
          "span": {
            "start": 719,
            "end": 725,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 719,
              "end": 725,
              "ctxt": 0
            },
            "value": "k1",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 721,
                "end": 725,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 723,
                  "end": 725,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 723,
                    "end": 725,
                    "ctxt": 0
                  },
                  "value": "K1",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        },
        {
          "type": "Parameter",
          "span": {
            "start": 727,
            "end": 733,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 727,
              "end": 733,
              "ctxt": 0
            },
            "value": "k2",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 729,
                "end": 733,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 731,
                  "end": 733,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 731,
                    "end": 733,
                    "ctxt": 0
                  },
                  "value": "K2",
                  "optional": false
                },
                "typeParams": null
              }
            }
          }
        }
      ],
      "decorators": [],
      "span": {
        "start": 650,
        "end": 783,
        "ctxt": 0
      },
      "body": {
        "type": "BlockStatement",
        "span": {
          "start": 735,
          "end": 783,
          "ctxt": 0
        },
        "stmts": [
          {
            "type": "VariableDeclaration",
            "span": {
              "start": 741,
              "end": 781,
              "ctxt": 0
            },
            "kind": "let",
            "declare": false,
            "declarations": [
              {
                "type": "VariableDeclarator",
                "span": {
                  "start": 745,
                  "end": 780,
                  "ctxt": 0
                },
                "id": {
                  "type": "ObjectPattern",
                  "span": {
                    "start": 745,
                    "end": 774,
                    "ctxt": 0
                  },
                  "properties": [
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 747,
                          "end": 751,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "Identifier",
                          "span": {
                            "start": 748,
                            "end": 750,
                            "ctxt": 0
                          },
                          "value": "k1",
                          "optional": false
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 753,
                          "end": 755,
                          "ctxt": 0
                        },
                        "value": "a1",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "KeyValuePatternProperty",
                      "key": {
                        "type": "Computed",
                        "span": {
                          "start": 757,
                          "end": 761,
                          "ctxt": 0
                        },
                        "expression": {
                          "type": "Identifier",
                          "span": {
                            "start": 758,
                            "end": 760,
                            "ctxt": 0
                          },
                          "value": "k2",
                          "optional": false
                        }
                      },
                      "value": {
                        "type": "Identifier",
                        "span": {
                          "start": 763,
                          "end": 765,
                          "ctxt": 0
                        },
                        "value": "a2",
                        "optional": false,
                        "typeAnnotation": null
                      }
                    },
                    {
                      "type": "RestElement",
                      "span": {
                        "start": 767,
                        "end": 772,
                        "ctxt": 0
                      },
                      "rest": {
                        "start": 767,
                        "end": 770,
                        "ctxt": 0
                      },
                      "argument": {
                        "type": "Identifier",
                        "span": {
                          "start": 770,
                          "end": 772,
                          "ctxt": 0
                        },
                        "value": "r1",
                        "optional": false,
                        "typeAnnotation": null
                      },
                      "typeAnnotation": null
                    }
                  ],
                  "optional": false,
                  "typeAnnotation": null
                },
                "init": {
                  "type": "Identifier",
                  "span": {
                    "start": 777,
                    "end": 780,
                    "ctxt": 0
                  },
                  "value": "obj",
                  "optional": false
                },
                "definite": false
              }
            ]
          }
        ]
      },
      "generator": false,
      "async": false,
      "typeParameters": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 661,
          "end": 707,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 662,
              "end": 683,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 662,
                "end": 664,
                "ctxt": 0
              },
              "value": "K1",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": {
              "type": "TsTypeOperator",
              "span": {
                "start": 673,
                "end": 683,
                "ctxt": 0
              },
              "op": "keyof",
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 679,
                  "end": 683,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 679,
                    "end": 683,
                    "ctxt": 0
                  },
                  "value": "Item",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "default": null
          },
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 685,
              "end": 706,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 685,
                "end": 687,
                "ctxt": 0
              },
              "value": "K2",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": {
              "type": "TsTypeOperator",
              "span": {
                "start": 696,
                "end": 706,
                "ctxt": 0
              },
              "op": "keyof",
              "typeAnnotation": {
                "type": "TsTypeReference",
                "span": {
                  "start": 702,
                  "end": 706,
                  "ctxt": 0
                },
                "typeName": {
                  "type": "Identifier",
                  "span": {
                    "start": 702,
                    "end": 706,
                    "ctxt": 0
                  },
                  "value": "Item",
                  "optional": false
                },
                "typeParams": null
              }
            },
            "default": null
          }
        ]
      },
      "returnType": null
    }
  ],
  "interpreter": null
}