Doctrine\Common\Cache\MemcachedCache::doSave PHP Method

    protected function doSave($id, $data, $lifeTime = 0)
    {
        if ($lifeTime > 30 * 24 * 3600) {
            $lifeTime = time() + $lifeTime;
        }
        return $this->memcached->set($id, $data, (int) $lifeTime);
    }

 public function doSave($id, $data, $lifeTime = 0)
 {
     return parent::doSave($id, $data, $lifeTime);
 }