private function getCachedContent()
    {
        $item = null;

        if (null !== $this->cache) {
            $item = $this->cache->getItem($this->cacheKey);
            $cacheContent = $item->get();

            if ($item->isHit() && null !== $cacheContent) {
                $this->contentCache = $cacheContent;
            }
        }

        return $item;
    }