Doctrine\ODM\MongoDB\UnitOfWork::getDocumentPersister PHP Method

    public function getDocumentPersister($documentName)
    {
        if (!isset($this->persisters[$documentName])) {
            $class = $this->dm->getClassMetadata($documentName);
            $pb = $this->getPersistenceBuilder();
            $this->persisters[$documentName] = new Persisters\DocumentPersister($pb, $this->dm, $this->evm, $this, $this->hydratorFactory, $class);
        }
        return $this->persisters[$documentName];
    }

 /**
  * @param PersistentCollection $collection
  *
  * @return Query
  */
 public function createReferenceManyInverseSideQuery(PersistentCollection $collection)
 {
     $hints = $collection->getHints();
     $mapping = $collection->getMapping();
     $owner = $collection->getOwner();
     $ownerClass = $this->dm->getClassMetadata(get_class($owner));
     $targetClass = $this->dm->getClassMetadata($mapping['targetDocument']);
     $mappedByMapping = isset($targetClass->fieldMappings[$mapping['mappedBy']]) ? $targetClass->fieldMappings[$mapping['mappedBy']] : array();
     $mappedByFieldName = isset($mappedByMapping['simple']) && $mappedByMapping['simple'] ? $mapping['mappedBy'] : $mapping['mappedBy'] . '.$id';
     $criteria = $this->cm->merge(array($mappedByFieldName => $ownerClass->getIdentifierObject($owner)), $this->dm->getFilterCollection()->getFilterCriteria($targetClass), isset($mapping['criteria']) ? $mapping['criteria'] : array());
     $criteria = $this->uow->getDocumentPersister($mapping['targetDocument'])->prepareQueryOrNewObj($criteria);
     $qb = $this->dm->createQueryBuilder($mapping['targetDocument'])->setQueryArray($criteria);
     if (isset($mapping['sort'])) {
         $qb->sort($mapping['sort']);
     }
     if (isset($mapping['limit'])) {
         $qb->limit($mapping['limit']);
     }
     if (isset($mapping['skip'])) {
         $qb->skip($mapping['skip']);
     }
     if (!empty($hints[Query::HINT_SLAVE_OKAY])) {
         $qb->slaveOkay(true);
     }
     if (!empty($hints[Query::HINT_READ_PREFERENCE])) {
         $qb->setReadPreference($hints[Query::HINT_READ_PREFERENCE], $hints[Query::HINT_READ_PREFERENCE_TAGS]);
     }
     return $qb->getQuery();
 }