Fixes #867 (closed)
Adds a property system helper to check whether a type is undefined/unspecialized for a given TypeTag and a helper for getting that type or a provided type in case it's undefined.
Fixes #867 (closed)
Adds a property system helper to check whether a type is undefined/unspecialized for a given TypeTag and a helper for getting that type or a provided type in case it's undefined.