{
  "type": "File",
  "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":2,"column":10}},
  "program": {
    "type": "Program",
    "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":2,"column":10}},
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "ExpressionStatement",
        "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":2,"column":10}},
        "expression": {
          "type": "ArrowFunctionExpression",
          "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":2,"column":10}},
          "returnType": {
            "type": "TypeAnnotation",
            "start":10,"end":13,"loc":{"start":{"line":2,"column":0},"end":{"line":2,"column":3}},
            "typeAnnotation": {
              "type": "GenericTypeAnnotation",
              "start":12,"end":13,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":3}},
              "typeParameters": null,
              "id": {
                "type": "Identifier",
                "start":12,"end":13,"loc":{"start":{"line":2,"column":2},"end":{"line":2,"column":3},"identifierName":"t"},
                "name": "t"
              }
            }
          },
          "id": null,
          "generator": false,
          "async": true,
          "params": [
            {
              "type": "Identifier",
              "start":7,"end":8,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":8},"identifierName":"f"},
              "name": "f"
            }
          ],
          "body": {
            "type": "BlockStatement",
            "start":17,"end":20,"loc":{"start":{"line":2,"column":7},"end":{"line":2,"column":10}},
            "body": [],
            "directives": []
          }
        }
      }
    ],
    "directives": []
  }
}