Doctrine\Common\Cache\MemcachedCache::doDelete PHP Метод

    protected function doDelete($id)
    {
        return $this->memcached->delete($id) || $this->memcached->getResultCode() === Memcached::RES_NOTFOUND;
    }

 public function doDelete($id)
 {
     return parent::doDelete($id);
 }