@Override
 public void errorCallback(LLRPRuntimeException e, String readerName) throws RemoteException {
   toNotify.notifyError(e, readerName);
 }
 @Override
 public void messageReceivedCallback(byte[] message, String readerName) throws RemoteException {
   toNotify.notify(message, readerName);
 }
 @Override
 public void deregisterFromAsynchronous(AsynchronousNotifiable receiver) throws RemoteException {
   toNotify.remove(receiver);
 }
 @Override
 public void registerForAsynchronous(AsynchronousNotifiable receiver) throws RemoteException {
   toNotify.add(receiver);
 }