/**
  * @param QueryBuilder
  * @param int
  * @param int
  */
 private function configureUpdateQb(QueryBuilder $qb, $newPos, $oldPos)
 {
     $qb->update();
     if ($newPos < $oldPos) {
         $shiftFrom = $newPos;
         $shiftTo = $oldPos - 1;
         $sign = '+';
     } else {
         $shiftFrom = $oldPos + 1;
         $shiftTo = $newPos;
         $sign = '-';
     }
     $qb->andWhere('e.position >= :from');
     $qb->andWhere('e.position <= :to');
     $qb->setParameter('from', $shiftFrom);
     $qb->setParameter('to', $shiftTo);
     $qb->set('e.position', "e.position {$sign} 1");
 }