@protocol OWLIdentifiedEntity <OWLEntity>
Allows the conversion of OWLEntity to numerical identifiers and back.
WarningThis protocol is very unsafe, so it should be used sparingly.
NoteAll OWLEntity instances also implement this protocol, so it can be used by simply casting to OWLIdentifiedEntity.
The identifier of this entity.
WarningThe identifier is only valid until the entity is dealloated. Attempts to use it after the entity has been deallocated is undefined behavior.