private void createCommentsAndRatingsLink(UserRequest ureq, Feed feed, Item item) {
CommentAndRatingService commentAndRatingService = (CommentAndRatingService) ServiceFactory.getServiceOrNull(CommentAndRatingService.class);
if (commentAndRatingService != null) {
commentAndRatingService.init(getIdentity(), feed, item.getGuid(), callback.mayEditMetadata(), ureq.getUserSession().getRoles().isGuestOnly());
UserCommentsAndRatingsController commentsAndRatingCtr = commentAndRatingService.createUserCommentsAndRatingControllerMinimized(ureq, getWindowControl());
commentsAndRatingCtr.addUserObject(item);
listenTo(commentsAndRatingCtr);
String guid = item.getGuid();
vcItems.put("commentsAndRating." + guid, commentsAndRatingCtr.getInitialComponent());
}
}