list zombie objects

Is there a way to list all "zombie" objects? For example, deleting a pool member doesn't deletes its associated node (which can remain as an zombie) I would like to list all objects which are configured but not referenced elsewhere (pool not associated with a VS or used in an irule / profiles not associated with a VS / etc...). In other words: perform a config cleanup (other than manually verifying all objects). The Network Map provides kind of an (incomplete) list of used objects. Other difficulty: many objects are used in the APM Access Policies and do not appear in the Network Map. Thanks