protected function putCache($cacheKey, array $cacheInfo)
    {
        $cacheKey = 'combiner.'.$cacheKey;

        if (Cache::has($cacheKey)) {
            return false;
        }

        $this->putCacheIndex($cacheKey);
        Cache::forever($cacheKey, base64_encode(serialize($cacheInfo)));
        return true;
    }