src/Service/Driver/Memcache.php
public function get($key)
    {
        $key = $this->prefix.$key;
        if ($time = $this->memcache->get($key)) {
            return (new \DateTime())->setTimestamp($time);
        }

        return null;
    }
public function get($key)
    {
        $key = $this->prefix.$key;
        if ($time = $this->memcache->get($key)) {
            return (new \DateTime())->setTimestamp($time);
        }

        return null;
    }
@param string $key

@return \DateTime|null