Neos\Cache\Backend\MemcachedBackend::setItem PHP Метод

    protected function setItem($key, $value, $expiration)
    {
        if ($this->memcache instanceof \Memcached) {
            return $this->memcache->set($key, $value, $expiration);
        }
        return $this->memcache->set($key, $value, $this->flags, $expiration);
    }