{ "type": "Script", "span": { "start": 51, "end": 123, "ctxt": 0 }, "body": [ { "type": "TsInterfaceDeclaration", "span": { "start": 51, "end": 99, "ctxt": 0 }, "id": { "type": "Identifier", "span": { "start": 61, "end": 64, "ctxt": 0 }, "value": "Foo", "optional": false }, "declare": false, "typeParams": null, "extends": [], "body": { "type": "TsInterfaceBody", "span": { "start": 65, "end": 99, "ctxt": 0 }, "body": [ { "type": "TsPropertySignature", "span": { "start": 71, "end": 82, "ctxt": 0 }, "readonly": false, "key": { "type": "Identifier", "span": { "start": 71, "end": 72, "ctxt": 0 }, "value": "a", "optional": false }, "computed": false, "optional": true, "init": null, "params": [], "typeAnnotation": { "type": "TsTypeAnnotation", "span": { "start": 73, "end": 81, "ctxt": 0 }, "typeAnnotation": { "type": "TsKeywordType", "span": { "start": 75, "end": 81, "ctxt": 0 }, "kind": "string" } }, "typeParams": null }, { "type": "TsPropertySignature", "span": { "start": 87, "end": 97, "ctxt": 0 }, "readonly": false, "key": { "type": "Identifier", "span": { "start": 87, "end": 88, "ctxt": 0 }, "value": "b", "optional": false }, "computed": false, "optional": false, "init": null, "params": [], "typeAnnotation": { "type": "TsTypeAnnotation", "span": { "start": 88, "end": 96, "ctxt": 0 }, "typeAnnotation": { "type": "TsKeywordType", "span": { "start": 90, "end": 96, "ctxt": 0 }, "kind": "string" } }, "typeParams": null } ] } }, { "type": "ExpressionStatement", "span": { "start": 101, "end": 123, "ctxt": 0 }, "expression": { "type": "TsTypeAssertion", "span": { "start": 101, "end": 122, "ctxt": 0 }, "expression": { "type": "ObjectExpression", "span": { "start": 106, "end": 122, "ctxt": 0 }, "properties": [ { "type": "KeyValueProperty", "key": { "type": "Identifier", "span": { "start": 108, "end": 109, "ctxt": 0 }, "value": "a", "optional": false }, "value": { "type": "Identifier", "span": { "start": 111, "end": 120, "ctxt": 0 }, "value": "undefined", "optional": false } } ] }, "typeAnnotation": { "type": "TsTypeReference", "span": { "start": 102, "end": 105, "ctxt": 0 }, "typeName": { "type": "Identifier", "span": { "start": 102, "end": 105, "ctxt": 0 }, "value": "Foo", "optional": false }, "typeParams": null } } } ], "interpreter": null }