[youtubei.js](../../../../README.md) / [Generator](../README.md) / introspect # Function: introspect() > **introspect**(`classdata`): `object` Defined in: [src/parser/generator.ts:376](https://github.com/LuanRT/YouTube.js/blob/853a36307b5d644ada14dcb1216c2c22c2ae7b73/src/parser/generator.ts#L376) Introspect an example of a class in order to determine its key info and dependencies ## Parameters ### classdata `unknown` The example of the class ## Returns `object` The key info and any unimplemented dependencies ### key\_info > **key\_info**: readonly \[`string`, [`InferenceType`](../type-aliases/InferenceType.md)\][] ### unimplemented\_dependencies > **unimplemented\_dependencies**: \[`string`, `any`\][]