{
  "type": "File",
  "start":0,"end":31,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
  "program": {
    "type": "Program",
    "start":0,"end":31,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "TSInterfaceDeclaration",
        "start":0,"end":31,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
        "id": {
          "type": "Identifier",
          "start":10,"end":11,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":11},"identifierName":"I"},
          "name": "I"
        },
        "body": {
          "type": "TSInterfaceBody",
          "start":12,"end":31,"loc":{"start":{"line":1,"column":12},"end":{"line":3,"column":1}},
          "body": [
            {
              "type": "TSMethodSignature",
              "start":18,"end":29,"loc":{"start":{"line":2,"column":4},"end":{"line":2,"column":15}},
              "key": {
                "type": "Identifier",
                "start":18,"end":19,"loc":{"start":{"line":2,"column":4},"end":{"line":2,"column":5},"identifierName":"m"},
                "name": "m"
              },
              "computed": false,
              "optional": true,
              "parameters": [],
              "typeAnnotation": {
                "type": "TSTypeAnnotation",
                "start":22,"end":28,"loc":{"start":{"line":2,"column":8},"end":{"line":2,"column":14}},
                "typeAnnotation": {
                  "type": "TSVoidKeyword",
                  "start":24,"end":28,"loc":{"start":{"line":2,"column":10},"end":{"line":2,"column":14}}
                }
              }
            }
          ]
        }
      }
    ],
    "directives": []
  }
}