public final function PersistedIdentifyingRelationship($ParentEntity, $ChildEntity, UnitOfWork $UnitOfWork)
{
$ParentIdentity = $this->VerifyEntity(__METHOD__, $ParentEntity)->Identity($ParentEntity);
$RelatedPersistenceData = $this->VerifyEntity(__METHOD__, $ChildEntity)->Persist($UnitOfWork, $ChildEntity);
return new PersistedRelationship($ParentIdentity, null, $RelatedPersistenceData);
}