docs: public final Reactor registerChannel(SelectableChannel channel, int ops,
  			Object attachment) {
  		awaitReady();
  		int index = 0;
  		// Accept event used index 0 reactor
  		if (ops == SelectionKey.OP_ACCEPT || ops == SelectionKey.OP_CONNECT) {
  			index = 0;
  		} else {
  			index = sets.incrementAndGet() % dividend + 1;
  		}
  		final Reactor reactor = reactorSet[index];
  		reactor.registerChannel(channel, ops, attachment);
  		return reactor;
  
  	}