filterSubclassesOf

Filters the given identifiers to only include those whose actual object are subclasses of the given class parameter.

This class properly handles:

  • Cases where the "advertised" type in the identifier is not a subclass but the actual instance is (usually the case with services).

  • Ignore non-canonical resolvers (e.g. this function only keeps actual objects and will not include aliases that happen to also match the subclass).