public function handleCreate(CreateEvent $event)
 {
     $this->create = true;
     $event->setDocument(new \stdClass());
 }
 /**
  * @param mixed $event
  */
 public function handleCreate(CreateEvent $event)
 {
     $metadata = $this->metadataFactory->getMetadataForAlias($event->getAlias());
     $document = $this->instantiateFromMetadata($metadata);
     $event->setDocument($document);
 }