private function addInheritedDocumentOptions(ClassMetadata $subClass, ClassMetadata $parentClass)
{
$subClass->setCustomRepositoryClassName($parentClass->customRepositoryClassName);
$subClass->setTranslator($parentClass->translator);
$subClass->setVersioned($parentClass->versionable);
$subClass->setReferenceable($parentClass->referenceable);
$subClass->setNodeType($parentClass->getNodeType());
}