Neos\Media\Domain\Model\ThumbnailConfiguration::getHash PHP Метод

    public function getHash()
    {
        return md5(json_encode($this->toArray()));
    }

 /**
  * Returns a thumbnail of the given asset with the specified dimensions.
  *
  * @param AssetInterface $asset The asset to render a thumbnail for
  * @param ThumbnailConfiguration $configuration
  * @return \Neos\Media\Domain\Model\Thumbnail The thumbnail or NULL
  */
 public function findOneByAssetAndThumbnailConfiguration(AssetInterface $asset, ThumbnailConfiguration $configuration)
 {
     /**
      * @var $query \Doctrine\ORM\Query
      */
     $query = $this->entityManager->createQuery('SELECT t FROM Neos\\Media\\Domain\\Model\\Thumbnail t WHERE t.originalAsset = :originalAsset AND t.configurationHash = :configurationHash');
     $query->setParameter('originalAsset', $this->persistenceManager->getIdentifierByObject($asset));
     $query->setParameter('configurationHash', $configuration->getHash());
     $query->setMaxResults(1);
     $result = $query->getOneOrNullResult();
     return $result;
 }