http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public interface io.netty.handler.codec.http.HttpClientUpgradeHandler$UpgradeCodec
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.netty.handler.codec.http.HttpClientUpgradeHandler$UpgradeCodec
  super_class: java.lang.Object
{
  public abstract java.lang.CharSequence protocol();
    descriptor: ()Ljava/lang/CharSequence;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.util.Collection<java.lang.CharSequence> setUpgradeHeaders(io.netty.channel.ChannelHandlerContext, io.netty.handler.codec.http.HttpRequest);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/handler/codec/http/HttpRequest;)Ljava/util/Collection;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/handler/codec/http/HttpRequest;)Ljava/util/Collection<Ljava/lang/CharSequence;>;
    MethodParameters:
                Name  Flags
      ctx             
      upgradeRequest  

  public abstract void upgradeTo(io.netty.channel.ChannelHandlerContext, io.netty.handler.codec.http.FullHttpResponse);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/handler/codec/http/FullHttpResponse;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
                 Name  Flags
      ctx              
      upgradeResponse  
}
SourceFile: "HttpClientUpgradeHandler.java"
NestHost: io.netty.handler.codec.http.HttpClientUpgradeHandler
InnerClasses:
  public abstract UpgradeCodec = io.netty.handler.codec.http.HttpClientUpgradeHandler$UpgradeCodec of io.netty.handler.codec.http.HttpClientUpgradeHandler