code: public void setChannelHandlers(final List<ChannelHandler> channelHandlers) {
          this.channelHandlers = channelHandlers == null ? Collections.<ChannelHandler> emptyList() : channelHandlers;
      }
docs: Add additional {@link io.netty.channel.ChannelHandler}s to the {@link io.netty.bootstrap.ServerBootstrap}.
  <p>The additional channel handlers are being added <em>before</em> the HTTP handling.</p>
  
  @param channelHandlers the additional {@link io.netty.channel.ChannelHandler}s.