Doctrine\ODM\MongoDB\DocumentManager::getUnitOfWork PHP Method

    public function getUnitOfWork()
    {
        return $this->unitOfWork;
    }

 /**
  * {@inheritdoc}
  */
 public function create(DocumentManager $dm, array $mapping, BaseCollection $coll = null)
 {
     if ($coll === null) {
         $coll = !empty($mapping['collectionClass']) ? $this->createCollectionClass($mapping['collectionClass']) : new ArrayCollection();
     }
     if (empty($mapping['collectionClass'])) {
         return new PersistentCollection($coll, $dm, $dm->getUnitOfWork());
     }
     $className = $dm->getConfiguration()->getPersistentCollectionGenerator()->loadClass($mapping['collectionClass'], $dm->getConfiguration()->getAutoGeneratePersistentCollectionClasses());
     return new $className($coll, $dm, $dm->getUnitOfWork());
 }