docs: public ReceiverQueue createReceiver(int limit) {
  		synchronized (receivers) {
  			ReceiverQueue q = null;
  			if (!closed && (maxNrofReceivers == 0 || receivers.size() < maxNrofReceivers)) {
  				q = new ReceiverQueue(/*this, */limit);
  				receivers.add(q);
  			}
  			return q;
  		}
  	}