code: @Override
  	public void close() {
  		executor.shutdown();
  		for (SelectionKey key : selector.keys()) {
  			((Attachment) key.attachment()).finishClose();
  		}
  		try {
  			selector.close();
  		} catch (IOException e) {/**/}
  	}
docs: Unregisters, closes all <b>Client</b>s and <b>Server</b>s,
  then closes the Connector itself.