Neos\Cache\Backend\RedisBackend::key PHP Метод

    public function key()
    {
        $entryIdentifier = $this->redis->lIndex($this->buildKey('entries'), $this->entryCursor);
        if ($entryIdentifier !== false) {
            if (!$this->has($entryIdentifier)) {
                return false;
            }
        }
        return $entryIdentifier;
    }