{
  "type": "Script",
  "span": {
    "start": 43,
    "end": 436,
    "ctxt": 0
  },
  "body": [
    {
      "type": "FunctionDeclaration",
      "identifier": {
        "type": "Identifier",
        "span": {
          "start": 60,
          "end": 62,
          "ctxt": 0
        },
        "value": "f1",
        "optional": false
      },
      "declare": true,
      "params": [
        {
          "type": "Parameter",
          "span": {
            "start": 66,
            "end": 84,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 66,
              "end": 84,
              "ctxt": 0
            },
            "value": "cb",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 68,
                "end": 84,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsFunctionType",
                "span": {
                  "start": 70,
                  "end": 84,
                  "ctxt": 0
                },
                "params": [
                  {
                    "type": "Identifier",
                    "span": {
                      "start": 74,
                      "end": 78,
                      "ctxt": 0
                    },
                    "value": "x",
                    "optional": false,
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 75,
                        "end": 78,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsTypeReference",
                        "span": {
                          "start": 77,
                          "end": 78,
                          "ctxt": 0
                        },
                        "typeName": {
                          "type": "Identifier",
                          "span": {
                            "start": 77,
                            "end": 78,
                            "ctxt": 0
                          },
                          "value": "S",
                          "optional": false
                        },
                        "typeParams": null
                      }
                    }
                  }
                ],
                "typeParams": {
                  "type": "TsTypeParameterDeclaration",
                  "span": {
                    "start": 70,
                    "end": 73,
                    "ctxt": 0
                  },
                  "parameters": [
                    {
                      "type": "TsTypeParameter",
                      "span": {
                        "start": 71,
                        "end": 72,
                        "ctxt": 0
                      },
                      "name": {
                        "type": "Identifier",
                        "span": {
                          "start": 71,
                          "end": 72,
                          "ctxt": 0
                        },
                        "value": "S",
                        "optional": false
                      },
                      "constraint": null,
                      "default": null
                    }
                  ]
                },
                "typeAnnotation": {
                  "type": "TsTypeAnnotation",
                  "span": {
                    "start": 80,
                    "end": 84,
                    "ctxt": 0
                  },
                  "typeAnnotation": {
                    "type": "TsTypeReference",
                    "span": {
                      "start": 83,
                      "end": 84,
                      "ctxt": 0
                    },
                    "typeName": {
                      "type": "Identifier",
                      "span": {
                        "start": 83,
                        "end": 84,
                        "ctxt": 0
                      },
                      "value": "T",
                      "optional": false
                    },
                    "typeParams": null
                  }
                }
              }
            }
          }
        }
      ],
      "decorators": [],
      "span": {
        "start": 43,
        "end": 89,
        "ctxt": 0
      },
      "body": null,
      "generator": false,
      "async": false,
      "typeParameters": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 62,
          "end": 65,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 63,
              "end": 64,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 63,
                "end": 64,
                "ctxt": 0
              },
              "value": "T",
              "optional": false
            },
            "constraint": null,
            "default": null
          }
        ]
      },
      "returnType": {
        "type": "TsTypeAnnotation",
        "span": {
          "start": 85,
          "end": 88,
          "ctxt": 0
        },
        "typeAnnotation": {
          "type": "TsTypeReference",
          "span": {
            "start": 87,
            "end": 88,
            "ctxt": 0
          },
          "typeName": {
            "type": "Identifier",
            "span": {
              "start": 87,
              "end": 88,
              "ctxt": 0
            },
            "value": "T",
            "optional": false
          },
          "typeParams": null
        }
      }
    },
    {
      "type": "FunctionDeclaration",
      "identifier": {
        "type": "Identifier",
        "span": {
          "start": 108,
          "end": 110,
          "ctxt": 0
        },
        "value": "f2",
        "optional": false
      },
      "declare": true,
      "params": [
        {
          "type": "Parameter",
          "span": {
            "start": 114,
            "end": 147,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 114,
              "end": 147,
              "ctxt": 0
            },
            "value": "cb",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 116,
                "end": 147,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsFunctionType",
                "span": {
                  "start": 118,
                  "end": 147,
                  "ctxt": 0
                },
                "params": [
                  {
                    "type": "Identifier",
                    "span": {
                      "start": 137,
                      "end": 141,
                      "ctxt": 0
                    },
                    "value": "x",
                    "optional": false,
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 138,
                        "end": 141,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsTypeReference",
                        "span": {
                          "start": 140,
                          "end": 141,
                          "ctxt": 0
                        },
                        "typeName": {
                          "type": "Identifier",
                          "span": {
                            "start": 140,
                            "end": 141,
                            "ctxt": 0
                          },
                          "value": "S",
                          "optional": false
                        },
                        "typeParams": null
                      }
                    }
                  }
                ],
                "typeParams": {
                  "type": "TsTypeParameterDeclaration",
                  "span": {
                    "start": 118,
                    "end": 136,
                    "ctxt": 0
                  },
                  "parameters": [
                    {
                      "type": "TsTypeParameter",
                      "span": {
                        "start": 119,
                        "end": 135,
                        "ctxt": 0
                      },
                      "name": {
                        "type": "Identifier",
                        "span": {
                          "start": 119,
                          "end": 120,
                          "ctxt": 0
                        },
                        "value": "S",
                        "optional": false
                      },
                      "constraint": {
                        "type": "TsKeywordType",
                        "span": {
                          "start": 129,
                          "end": 135,
                          "ctxt": 0
                        },
                        "kind": "number"
                      },
                      "default": null
                    }
                  ]
                },
                "typeAnnotation": {
                  "type": "TsTypeAnnotation",
                  "span": {
                    "start": 143,
                    "end": 147,
                    "ctxt": 0
                  },
                  "typeAnnotation": {
                    "type": "TsTypeReference",
                    "span": {
                      "start": 146,
                      "end": 147,
                      "ctxt": 0
                    },
                    "typeName": {
                      "type": "Identifier",
                      "span": {
                        "start": 146,
                        "end": 147,
                        "ctxt": 0
                      },
                      "value": "T",
                      "optional": false
                    },
                    "typeParams": null
                  }
                }
              }
            }
          }
        }
      ],
      "decorators": [],
      "span": {
        "start": 91,
        "end": 152,
        "ctxt": 0
      },
      "body": null,
      "generator": false,
      "async": false,
      "typeParameters": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 110,
          "end": 113,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 111,
              "end": 112,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 111,
                "end": 112,
                "ctxt": 0
              },
              "value": "T",
              "optional": false
            },
            "constraint": null,
            "default": null
          }
        ]
      },
      "returnType": {
        "type": "TsTypeAnnotation",
        "span": {
          "start": 148,
          "end": 151,
          "ctxt": 0
        },
        "typeAnnotation": {
          "type": "TsTypeReference",
          "span": {
            "start": 150,
            "end": 151,
            "ctxt": 0
          },
          "typeName": {
            "type": "Identifier",
            "span": {
              "start": 150,
              "end": 151,
              "ctxt": 0
            },
            "value": "T",
            "optional": false
          },
          "typeParams": null
        }
      }
    },
    {
      "type": "FunctionDeclaration",
      "identifier": {
        "type": "Identifier",
        "span": {
          "start": 171,
          "end": 173,
          "ctxt": 0
        },
        "value": "f3",
        "optional": false
      },
      "declare": true,
      "params": [
        {
          "type": "Parameter",
          "span": {
            "start": 177,
            "end": 212,
            "ctxt": 0
          },
          "decorators": [],
          "pat": {
            "type": "Identifier",
            "span": {
              "start": 177,
              "end": 212,
              "ctxt": 0
            },
            "value": "cb",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 179,
                "end": 212,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsFunctionType",
                "span": {
                  "start": 181,
                  "end": 212,
                  "ctxt": 0
                },
                "params": [
                  {
                    "type": "Identifier",
                    "span": {
                      "start": 202,
                      "end": 206,
                      "ctxt": 0
                    },
                    "value": "x",
                    "optional": false,
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 203,
                        "end": 206,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsTypeReference",
                        "span": {
                          "start": 205,
                          "end": 206,
                          "ctxt": 0
                        },
                        "typeName": {
                          "type": "Identifier",
                          "span": {
                            "start": 205,
                            "end": 206,
                            "ctxt": 0
                          },
                          "value": "S",
                          "optional": false
                        },
                        "typeParams": null
                      }
                    }
                  }
                ],
                "typeParams": {
                  "type": "TsTypeParameterDeclaration",
                  "span": {
                    "start": 181,
                    "end": 201,
                    "ctxt": 0
                  },
                  "parameters": [
                    {
                      "type": "TsTypeParameter",
                      "span": {
                        "start": 182,
                        "end": 200,
                        "ctxt": 0
                      },
                      "name": {
                        "type": "Identifier",
                        "span": {
                          "start": 182,
                          "end": 183,
                          "ctxt": 0
                        },
                        "value": "S",
                        "optional": false
                      },
                      "constraint": {
                        "type": "TsTypeReference",
                        "span": {
                          "start": 192,
                          "end": 200,
                          "ctxt": 0
                        },
                        "typeName": {
                          "type": "Identifier",
                          "span": {
                            "start": 192,
                            "end": 197,
                            "ctxt": 0
                          },
                          "value": "Array",
                          "optional": false
                        },
                        "typeParams": {
                          "type": "TsTypeParameterInstantiation",
                          "span": {
                            "start": 197,
                            "end": 200,
                            "ctxt": 0
                          },
                          "params": [
                            {
                              "type": "TsTypeReference",
                              "span": {
                                "start": 198,
                                "end": 199,
                                "ctxt": 0
                              },
                              "typeName": {
                                "type": "Identifier",
                                "span": {
                                  "start": 198,
                                  "end": 199,
                                  "ctxt": 0
                                },
                                "value": "S",
                                "optional": false
                              },
                              "typeParams": null
                            }
                          ]
                        }
                      },
                      "default": null
                    }
                  ]
                },
                "typeAnnotation": {
                  "type": "TsTypeAnnotation",
                  "span": {
                    "start": 208,
                    "end": 212,
                    "ctxt": 0
                  },
                  "typeAnnotation": {
                    "type": "TsTypeReference",
                    "span": {
                      "start": 211,
                      "end": 212,
                      "ctxt": 0
                    },
                    "typeName": {
                      "type": "Identifier",
                      "span": {
                        "start": 211,
                        "end": 212,
                        "ctxt": 0
                      },
                      "value": "T",
                      "optional": false
                    },
                    "typeParams": null
                  }
                }
              }
            }
          }
        }
      ],
      "decorators": [],
      "span": {
        "start": 154,
        "end": 217,
        "ctxt": 0
      },
      "body": null,
      "generator": false,
      "async": false,
      "typeParameters": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 173,
          "end": 176,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 174,
              "end": 175,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 174,
                "end": 175,
                "ctxt": 0
              },
              "value": "T",
              "optional": false
            },
            "constraint": null,
            "default": null
          }
        ]
      },
      "returnType": {
        "type": "TsTypeAnnotation",
        "span": {
          "start": 213,
          "end": 216,
          "ctxt": 0
        },
        "typeAnnotation": {
          "type": "TsTypeReference",
          "span": {
            "start": 215,
            "end": 216,
            "ctxt": 0
          },
          "typeName": {
            "type": "Identifier",
            "span": {
              "start": 215,
              "end": 216,
              "ctxt": 0
            },
            "value": "T",
            "optional": false
          },
          "typeParams": null
        }
      }
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 221,
        "end": 241,
        "ctxt": 0
      },
      "kind": "let",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 225,
            "end": 240,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 225,
              "end": 227,
              "ctxt": 0
            },
            "value": "x1",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 230,
              "end": 240,
              "ctxt": 0
            },
            "callee": {
              "type": "Identifier",
              "span": {
                "start": 230,
                "end": 232,
                "ctxt": 0
              },
              "value": "f1",
              "optional": false
            },
            "arguments": [
              {
                "spread": null,
                "expression": {
                  "type": "ArrowFunctionExpression",
                  "span": {
                    "start": 233,
                    "end": 239,
                    "ctxt": 0
                  },
                  "params": [
                    {
                      "type": "Identifier",
                      "span": {
                        "start": 233,
                        "end": 234,
                        "ctxt": 0
                      },
                      "value": "x",
                      "optional": false,
                      "typeAnnotation": null
                    }
                  ],
                  "body": {
                    "type": "Identifier",
                    "span": {
                      "start": 238,
                      "end": 239,
                      "ctxt": 0
                    },
                    "value": "x",
                    "optional": false
                  },
                  "async": false,
                  "generator": false,
                  "typeParameters": null,
                  "returnType": null
                }
              }
            ],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 250,
        "end": 270,
        "ctxt": 0
      },
      "kind": "let",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 254,
            "end": 269,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 254,
              "end": 256,
              "ctxt": 0
            },
            "value": "x2",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 259,
              "end": 269,
              "ctxt": 0
            },
            "callee": {
              "type": "Identifier",
              "span": {
                "start": 259,
                "end": 261,
                "ctxt": 0
              },
              "value": "f2",
              "optional": false
            },
            "arguments": [
              {
                "spread": null,
                "expression": {
                  "type": "ArrowFunctionExpression",
                  "span": {
                    "start": 262,
                    "end": 268,
                    "ctxt": 0
                  },
                  "params": [
                    {
                      "type": "Identifier",
                      "span": {
                        "start": 262,
                        "end": 263,
                        "ctxt": 0
                      },
                      "value": "x",
                      "optional": false,
                      "typeAnnotation": null
                    }
                  ],
                  "body": {
                    "type": "Identifier",
                    "span": {
                      "start": 267,
                      "end": 268,
                      "ctxt": 0
                    },
                    "value": "x",
                    "optional": false
                  },
                  "async": false,
                  "generator": false,
                  "typeParameters": null,
                  "returnType": null
                }
              }
            ],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 283,
        "end": 303,
        "ctxt": 0
      },
      "kind": "let",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 287,
            "end": 302,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 287,
              "end": 289,
              "ctxt": 0
            },
            "value": "x3",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 292,
              "end": 302,
              "ctxt": 0
            },
            "callee": {
              "type": "Identifier",
              "span": {
                "start": 292,
                "end": 294,
                "ctxt": 0
              },
              "value": "f3",
              "optional": false
            },
            "arguments": [
              {
                "spread": null,
                "expression": {
                  "type": "ArrowFunctionExpression",
                  "span": {
                    "start": 295,
                    "end": 301,
                    "ctxt": 0
                  },
                  "params": [
                    {
                      "type": "Identifier",
                      "span": {
                        "start": 295,
                        "end": 296,
                        "ctxt": 0
                      },
                      "value": "x",
                      "optional": false,
                      "typeAnnotation": null
                    }
                  ],
                  "body": {
                    "type": "Identifier",
                    "span": {
                      "start": 300,
                      "end": 301,
                      "ctxt": 0
                    },
                    "value": "x",
                    "optional": false
                  },
                  "async": false,
                  "generator": false,
                  "typeParameters": null,
                  "returnType": null
                }
              }
            ],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 346,
        "end": 407,
        "ctxt": 0
      },
      "kind": "const",
      "declare": true,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 360,
            "end": 406,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 360,
              "end": 361,
              "ctxt": 0
            },
            "value": "s",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 361,
                "end": 406,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsFunctionType",
                "span": {
                  "start": 363,
                  "end": 406,
                  "ctxt": 0
                },
                "params": [
                  {
                    "type": "Identifier",
                    "span": {
                      "start": 367,
                      "end": 400,
                      "ctxt": 0
                    },
                    "value": "go",
                    "optional": false,
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 369,
                        "end": 400,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsFunctionType",
                        "span": {
                          "start": 371,
                          "end": 400,
                          "ctxt": 0
                        },
                        "params": [
                          {
                            "type": "Identifier",
                            "span": {
                              "start": 375,
                              "end": 394,
                              "ctxt": 0
                            },
                            "value": "ops",
                            "optional": false,
                            "typeAnnotation": {
                              "type": "TsTypeAnnotation",
                              "span": {
                                "start": 378,
                                "end": 394,
                                "ctxt": 0
                              },
                              "typeAnnotation": {
                                "type": "TsTypeLiteral",
                                "span": {
                                  "start": 380,
                                  "end": 394,
                                  "ctxt": 0
                                },
                                "members": [
                                  {
                                    "type": "TsMethodSignature",
                                    "span": {
                                      "start": 382,
                                      "end": 392,
                                      "ctxt": 0
                                    },
                                    "readonly": false,
                                    "key": {
                                      "type": "Identifier",
                                      "span": {
                                        "start": 382,
                                        "end": 386,
                                        "ctxt": 0
                                      },
                                      "value": "init",
                                      "optional": false
                                    },
                                    "computed": false,
                                    "optional": false,
                                    "params": [],
                                    "typeAnn": {
                                      "type": "TsTypeAnnotation",
                                      "span": {
                                        "start": 388,
                                        "end": 391,
                                        "ctxt": 0
                                      },
                                      "typeAnnotation": {
                                        "type": "TsTypeReference",
                                        "span": {
                                          "start": 390,
                                          "end": 391,
                                          "ctxt": 0
                                        },
                                        "typeName": {
                                          "type": "Identifier",
                                          "span": {
                                            "start": 390,
                                            "end": 391,
                                            "ctxt": 0
                                          },
                                          "value": "S",
                                          "optional": false
                                        },
                                        "typeParams": null
                                      }
                                    },
                                    "typeParams": null
                                  }
                                ]
                              }
                            }
                          }
                        ],
                        "typeParams": {
                          "type": "TsTypeParameterDeclaration",
                          "span": {
                            "start": 371,
                            "end": 374,
                            "ctxt": 0
                          },
                          "parameters": [
                            {
                              "type": "TsTypeParameter",
                              "span": {
                                "start": 372,
                                "end": 373,
                                "ctxt": 0
                              },
                              "name": {
                                "type": "Identifier",
                                "span": {
                                  "start": 372,
                                  "end": 373,
                                  "ctxt": 0
                                },
                                "value": "S",
                                "optional": false
                              },
                              "constraint": null,
                              "default": null
                            }
                          ]
                        },
                        "typeAnnotation": {
                          "type": "TsTypeAnnotation",
                          "span": {
                            "start": 396,
                            "end": 400,
                            "ctxt": 0
                          },
                          "typeAnnotation": {
                            "type": "TsTypeReference",
                            "span": {
                              "start": 399,
                              "end": 400,
                              "ctxt": 0
                            },
                            "typeName": {
                              "type": "Identifier",
                              "span": {
                                "start": 399,
                                "end": 400,
                                "ctxt": 0
                              },
                              "value": "R",
                              "optional": false
                            },
                            "typeParams": null
                          }
                        }
                      }
                    }
                  }
                ],
                "typeParams": {
                  "type": "TsTypeParameterDeclaration",
                  "span": {
                    "start": 363,
                    "end": 366,
                    "ctxt": 0
                  },
                  "parameters": [
                    {
                      "type": "TsTypeParameter",
                      "span": {
                        "start": 364,
                        "end": 365,
                        "ctxt": 0
                      },
                      "name": {
                        "type": "Identifier",
                        "span": {
                          "start": 364,
                          "end": 365,
                          "ctxt": 0
                        },
                        "value": "R",
                        "optional": false
                      },
                      "constraint": null,
                      "default": null
                    }
                  ]
                },
                "typeAnnotation": {
                  "type": "TsTypeAnnotation",
                  "span": {
                    "start": 402,
                    "end": 406,
                    "ctxt": 0
                  },
                  "typeAnnotation": {
                    "type": "TsTypeReference",
                    "span": {
                      "start": 405,
                      "end": 406,
                      "ctxt": 0
                    },
                    "typeName": {
                      "type": "Identifier",
                      "span": {
                        "start": 405,
                        "end": 406,
                        "ctxt": 0
                      },
                      "value": "R",
                      "optional": false
                    },
                    "typeParams": null
                  }
                }
              }
            }
          },
          "init": null,
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 409,
        "end": 436,
        "ctxt": 0
      },
      "kind": "const",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 415,
            "end": 435,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 415,
              "end": 416,
              "ctxt": 0
            },
            "value": "x",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 419,
              "end": 435,
              "ctxt": 0
            },
            "callee": {
              "type": "Identifier",
              "span": {
                "start": 419,
                "end": 420,
                "ctxt": 0
              },
              "value": "s",
              "optional": false
            },
            "arguments": [
              {
                "spread": null,
                "expression": {
                  "type": "ArrowFunctionExpression",
                  "span": {
                    "start": 421,
                    "end": 434,
                    "ctxt": 0
                  },
                  "params": [
                    {
                      "type": "Identifier",
                      "span": {
                        "start": 421,
                        "end": 422,
                        "ctxt": 0
                      },
                      "value": "a",
                      "optional": false,
                      "typeAnnotation": null
                    }
                  ],
                  "body": {
                    "type": "CallExpression",
                    "span": {
                      "start": 426,
                      "end": 434,
                      "ctxt": 0
                    },
                    "callee": {
                      "type": "MemberExpression",
                      "span": {
                        "start": 426,
                        "end": 432,
                        "ctxt": 0
                      },
                      "object": {
                        "type": "Identifier",
                        "span": {
                          "start": 426,
                          "end": 427,
                          "ctxt": 0
                        },
                        "value": "a",
                        "optional": false
                      },
                      "property": {
                        "type": "Identifier",
                        "span": {
                          "start": 428,
                          "end": 432,
                          "ctxt": 0
                        },
                        "value": "init",
                        "optional": false
                      }
                    },
                    "arguments": [],
                    "typeArguments": null
                  },
                  "async": false,
                  "generator": false,
                  "typeParameters": null,
                  "returnType": null
                }
              }
            ],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    }
  ],
  "interpreter": null
}