private void onNewsUpdated(Set<NewsEvent> events) {
for (NewsEvent event : events) {
INews currentNews = event.getEntity();
INews oldNews = event.getOldNews();
Assert.isNotNull(oldNews, "oldNews cannot be null on newsUpdated");
FeedLinkReference feedRef = currentNews.getFeedReference();
boolean oldStateUnread = ModelUtils.isUnread(oldNews.getState());
boolean currentStateUnread = ModelUtils.isUnread(currentNews.getState());
boolean oldStateNew = INews.State.NEW.equals(oldNews.getState());