original_string: public function getPersistenceHelper()
      {
          if (null === $this->persistenceHelper) {
              $this->persistenceHelper = new Doctrine\ORM\PersistenceHelper(
                  $this->em,
                  $this->getPersistenceEventQueue()
              );
          }
  
          return $this->persistenceHelper;
      }
code: public function getPersistenceHelper()
      {
          if (null === $this->persistenceHelper) {
              $this->persistenceHelper = new Doctrine\ORM\PersistenceHelper(
                  $this->em,
                  $this->getPersistenceEventQueue()
              );
          }
  
          return $this->persistenceHelper;
      }
code_tokens: public function getPersistenceHelper ( ) { if ( null === $ this -> persistenceHelper ) { $ this -> persistenceHelper = new Doctrine \ ORM \ PersistenceHelper ( $ this -> em , $ this -> getPersistenceEventQueue ( ) ) ; } return $ this -> persistenceHelper ; }
docstring: Returns the persistence helper.
  
  @return Persistence\PersistenceHelperInterface
docstring_tokens: Returns the persistence helper .