/** * Adds the query as presence listener to protocol provider service. * * @param pps the protocol provider service. */ public void addQueryToProviderPresenceListeners(ProtocolProviderService pps) { OperationSetMultiUserChat opSetMUC = pps.getOperationSet(OperationSetMultiUserChat.class); if (opSetMUC != null) { opSetMUC.addPresenceListener(this); } }