public function getLastPosition($entity)
 {
     $query = $this->em->createQuery(sprintf('SELECT MAX(m.%s) FROM %s m', $positionFiles = $this->getPositionFieldByEntity($entity), $entity));
     $result = $query->getResult();
     if (array_key_exists(0, $result)) {
         return intval($result[0][1]);
     }
     return 0;
 }