Doctrine\ODM\MongoDB\PersistentCollection::clearSnapshot PHP 메소드

    public function clearSnapshot()
    {
        $this->snapshot = array();
        $this->isDirty = $this->count() ? true : false;
    }

 /**
  * {@inheritdoc}
  */
 public function clearSnapshot()
 {
     $this->collection->clearSnapshot();
 }