{
  "type": "File",
  "start":0,"end":49,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":49}},
  "program": {
    "type": "Program",
    "start":0,"end":49,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":49}},
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "VariableDeclaration",
        "start":0,"end":49,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":49}},
        "declarations": [
          {
            "type": "VariableDeclarator",
            "start":4,"end":48,"loc":{"start":{"line":1,"column":4},"end":{"line":1,"column":48}},
            "id": {
              "type": "Identifier",
              "start":4,"end":7,"loc":{"start":{"line":1,"column":4},"end":{"line":1,"column":7},"identifierName":"foo"},
              "name": "foo"
            },
            "init": {
              "type": "TypeCastExpression",
              "start":11,"end":47,"loc":{"start":{"line":1,"column":11},"end":{"line":1,"column":47}},
              "expression": {
                "type": "ArrowFunctionExpression",
                "start":12,"end":38,"loc":{"start":{"line":1,"column":12},"end":{"line":1,"column":38}},
                "returnType": {
                  "type": "TypeAnnotation",
                  "start":23,"end":31,"loc":{"start":{"line":1,"column":23},"end":{"line":1,"column":31}},
                  "typeAnnotation": {
                    "type": "NumberTypeAnnotation",
                    "start":25,"end":31,"loc":{"start":{"line":1,"column":25},"end":{"line":1,"column":31}}
                  }
                },
                "id": null,
                "generator": false,
                "async": true,
                "params": [
                  {
                    "type": "Identifier",
                    "start":19,"end":22,"loc":{"start":{"line":1,"column":19},"end":{"line":1,"column":22},"identifierName":"bar"},
                    "name": "bar"
                  }
                ],
                "body": {
                  "type": "Identifier",
                  "start":35,"end":38,"loc":{"start":{"line":1,"column":35},"end":{"line":1,"column":38},"identifierName":"bar"},
                  "name": "bar"
                },
                "extra": {
                  "parenthesized": true,
                  "parenStart": 11
                }
              },
              "typeAnnotation": {
                "type": "TypeAnnotation",
                "start":39,"end":47,"loc":{"start":{"line":1,"column":39},"end":{"line":1,"column":47}},
                "typeAnnotation": {
                  "type": "NumberTypeAnnotation",
                  "start":41,"end":47,"loc":{"start":{"line":1,"column":41},"end":{"line":1,"column":47}}
                }
              },
              "extra": {
                "parenthesized": true,
                "parenStart": 10
              }
            }
          }
        ],
        "kind": "var"
      }
    ],
    "directives": []
  }
}