{
  "type": "File",
  "start":0,"end":42,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":42}},
  "program": {
    "type": "Program",
    "start":0,"end":42,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":42}},
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "ExportDefaultDeclaration",
        "start":0,"end":42,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":42}},
        "exportKind": "value",
        "declaration": {
          "type": "TSDeclareFunction",
          "start":15,"end":42,"loc":{"start":{"line":1,"column":15},"end":{"line":1,"column":42}},
          "id": null,
          "generator": false,
          "async": false,
          "params": [
            {
              "type": "Identifier",
              "start":24,"end":34,"loc":{"start":{"line":1,"column":24},"end":{"line":1,"column":34},"identifierName":"x"},
              "name": "x",
              "optional": true,
              "typeAnnotation": {
                "type": "TSTypeAnnotation",
                "start":26,"end":34,"loc":{"start":{"line":1,"column":26},"end":{"line":1,"column":34}},
                "typeAnnotation": {
                  "type": "TSNumberKeyword",
                  "start":28,"end":34,"loc":{"start":{"line":1,"column":28},"end":{"line":1,"column":34}}
                }
              }
            }
          ],
          "returnType": {
            "type": "TSTypeAnnotation",
            "start":35,"end":41,"loc":{"start":{"line":1,"column":35},"end":{"line":1,"column":41}},
            "typeAnnotation": {
              "type": "TSVoidKeyword",
              "start":37,"end":41,"loc":{"start":{"line":1,"column":37},"end":{"line":1,"column":41}}
            }
          }
        }
      }
    ],
    "directives": []
  }
}