code: public AioSession write(ByteBuffer data, CompletionHandler<Integer, AioSession> handler) {
  		this.channel.write(data, Math.max(this.writeTimeout, 0L), TimeUnit.MILLISECONDS, this, handler);
  		return this;
  	}
docs: 写数据到目标端
  
  @param handler {@link CompletionHandler}
  @return this