code: @Override
      protected void channelRead0(ChannelHandlerContext ctx, Response msg) throws Exception {
          answer.add(msg);
      }
docs: /*
  (non-Javadoc)
  
  @see io.netty.channel.SimpleChannelInboundHandler#channelRead0(io.netty.channel.ChannelHandlerContext ,
  java.lang.Object)