public ReachabilityAction(BookmarkController <T> controller, Host host)
 {
     _controller = controller;
     _host       = host;
 }
 public RemovedCollectionListener(BookmarkController <T> controller, Host host)
 {
     _controller = controller;
     _host       = host;
 }
 public FaviconAction(BookmarkController <T> controller, Host host)
 {
     _controller = controller;
     _host       = host;
 }