case R_UNSUBSCRIBE: return new UnsubscribeResponse();
case Q_PREFETCH: return new PrefetchQuery();
case Q_PING: return new PingQuery();
case R_PING: return new PingResponse();
case Q_ROLLBACK_MESSAGE: return new RollbackMessageQuery();
case R_ROLLBACK_MESSAGE: return new RollbackMessageResponse();
case Q_MULTIPLE_PUT: return new MultiplePutQuery();
case R_MULTIPLE_PUT: return new MultiplePutResponse();
case Q_ASYNC_ACKNOWLEDGE: return new AsyncAcknowledgeQuery();
default: