public function __construct(FeedCache $nextLevel, Cache $cache, ObjectMerge $merger, PageUrl $pageUrl = null, PageUpdateCheck $pageUpdateCheck = null, $limit = null)
 {
     parent::__construct($nextLevel, $cache);
     $this->merger = $merger;
     $this->pageUrl = $pageUrl;
     $this->pageUpdateCheck = $pageUpdateCheck;
     $this->limit = $limit;
 }
 public function __construct(FeedCache $nextLevel, Cache $cache)
 {
     parent::__construct($nextLevel, $cache);
 }