code: public void setHttpChannelHandlers(final List<ChannelHandler> httpChannelHandlers) {
          this.httpChannelHandlers = httpChannelHandlers == null ? Collections.<ChannelHandler> emptyList()
              : httpChannelHandlers;
      }
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>after</em> the HTTP handling.</p>
  
  @param httpChannelHandlers the additional {@link io.netty.channel.ChannelHandler}s.