Follows up on HSEARCH-1404 Pull Request Sent , HSEARCH-2768 Open , and HSEARCH-1379 Open .

Once engine APIs won't be exposed in the ORM integration anymore ( HSEARCH-2768 Open ), we'll be able to remove the methods in the engine that use Class<?> instead of IndexedTypeIdentifier.

We may want to wait until we'll have an abstraction over the metadata extraction process ( HSEARCH-1379 Open ), so that we can avoid dodgy conversions from IndexedTypeIdenfier to Class<?> in the engine implementation.