public Collection<MUCRoom> getMUCRooms() { HashSet<MUCRoom> retval = new HashSet<MUCRoom>(); for (MultiUserChatService mucService : this.multiUserChatManager.getMultiUserChatServices()) { List<MUCRoom> chatRooms = mucService.getChatRooms(); retval.addAll(chatRooms); } return retval; }