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1{
2  "type": "Program",
3  "statements": [
4    {
5      "type": "VariableDeclaration",
6      "declarations": [
7        {
8          "type": "VariableDeclarator",
9          "id": {
10            "type": "Identifier",
11            "name": "a",
12            "typeAnnotation": {
13              "type": "TSTypeLiteral",
14              "members": [
15                {
16                  "type": "TSPropertySignature",
17                  "computed": false,
18                  "optional": false,
19                  "readonly": false,
20                  "key": {
21                    "type": "Identifier",
22                    "name": "b",
23                    "decorators": [],
24                    "loc": {
25                      "start": {
26                        "line": 17,
27                        "column": 10
28                      },
29                      "end": {
30                        "line": 17,
31                        "column": 11
32                      }
33                    }
34                  },
35                  "typeAnnotation": {
36                    "type": "TSNumberKeyword",
37                    "loc": {
38                      "start": {
39                        "line": 17,
40                        "column": 13
41                      },
42                      "end": {
43                        "line": 17,
44                        "column": 19
45                      }
46                    }
47                  },
48                  "loc": {
49                    "start": {
50                      "line": 17,
51                      "column": 10
52                    },
53                    "end": {
54                      "line": 17,
55                      "column": 21
56                    }
57                  }
58                }
59              ],
60              "loc": {
61                "start": {
62                  "line": 17,
63                  "column": 8
64                },
65                "end": {
66                  "line": 17,
67                  "column": 21
68                }
69              }
70            },
71            "decorators": [],
72            "loc": {
73              "start": {
74                "line": 17,
75                "column": 5
76              },
77              "end": {
78                "line": 17,
79                "column": 6
80              }
81            }
82          },
83          "init": {
84            "type": "ObjectExpression",
85            "properties": [
86              {
87                "type": "Property",
88                "method": false,
89                "shorthand": false,
90                "computed": false,
91                "key": {
92                  "type": "Identifier",
93                  "name": "b",
94                  "decorators": [],
95                  "loc": {
96                    "start": {
97                      "line": 17,
98                      "column": 26
99                    },
100                    "end": {
101                      "line": 17,
102                      "column": 27
103                    }
104                  }
105                },
106                "value": {
107                  "type": "FunctionExpression",
108                  "function": {
109                    "type": "ScriptFunction",
110                    "id": null,
111                    "generator": false,
112                    "async": false,
113                    "expression": false,
114                    "params": [],
115                    "returnType": {
116                      "type": "TSStringKeyword",
117                      "loc": {
118                        "start": {
119                          "line": 17,
120                          "column": 42
121                        },
122                        "end": {
123                          "line": 17,
124                          "column": 48
125                        }
126                      }
127                    },
128                    "body": {
129                      "type": "BlockStatement",
130                      "statements": [
131                        {
132                          "type": "ReturnStatement",
133                          "argument": {
134                            "type": "StringLiteral",
135                            "value": "foo",
136                            "loc": {
137                              "start": {
138                                "line": 17,
139                                "column": 58
140                              },
141                              "end": {
142                                "line": 17,
143                                "column": 63
144                              }
145                            }
146                          },
147                          "loc": {
148                            "start": {
149                              "line": 17,
150                              "column": 51
151                            },
152                            "end": {
153                              "line": 17,
154                              "column": 63
155                            }
156                          }
157                        }
158                      ],
159                      "loc": {
160                        "start": {
161                          "line": 17,
162                          "column": 49
163                        },
164                        "end": {
165                          "line": 17,
166                          "column": 65
167                        }
168                      }
169                    },
170                    "loc": {
171                      "start": {
172                        "line": 17,
173                        "column": 29
174                      },
175                      "end": {
176                        "line": 17,
177                        "column": 65
178                      }
179                    }
180                  },
181                  "loc": {
182                    "start": {
183                      "line": 17,
184                      "column": 29
185                    },
186                    "end": {
187                      "line": 17,
188                      "column": 65
189                    }
190                  }
191                },
192                "kind": "init",
193                "loc": {
194                  "start": {
195                    "line": 17,
196                    "column": 26
197                  },
198                  "end": {
199                    "line": 17,
200                    "column": 65
201                  }
202                }
203              }
204            ],
205            "loc": {
206              "start": {
207                "line": 17,
208                "column": 24
209              },
210              "end": {
211                "line": 17,
212                "column": 67
213              }
214            }
215          },
216          "loc": {
217            "start": {
218              "line": 17,
219              "column": 5
220            },
221            "end": {
222              "line": 17,
223              "column": 67
224            }
225          }
226        }
227      ],
228      "kind": "var",
229      "loc": {
230        "start": {
231          "line": 17,
232          "column": 1
233        },
234        "end": {
235          "line": 17,
236          "column": 67
237        }
238      }
239    }
240  ],
241  "loc": {
242    "start": {
243      "line": 1,
244      "column": 1
245    },
246    "end": {
247      "line": 18,
248      "column": 1
249    }
250  }
251}
252TypeError: Type '() => string' is not assignable to type 'number'. [objectLiteralAssignability4.ts:17:26]
253