public function isEndTime($timeTtl)
    {
        $now = new \DateTime('now');
        $accessTime = date("Y-m-d H:i:s.", filemtime($this->filePath));
        $accessTime = new \DateTime($accessTime);
        $accessTime->modify(sprintf('+%s seconds', $timeTtl));

        if ($accessTime < $now) {
            return $this->createUnlock();
        } else {
            return true;
        }
    }