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.channel.MessageSizeEstimator
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.netty.channel.MessageSizeEstimator
  super_class: java.lang.Object
{
  public abstract io.netty.channel.MessageSizeEstimator$Handle newHandle();
    descriptor: ()Lio/netty/channel/MessageSizeEstimator$Handle;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "MessageSizeEstimator.java"
NestMembers:
  io.netty.channel.MessageSizeEstimator$Handle
InnerClasses:
  public abstract Handle = io.netty.channel.MessageSizeEstimator$Handle of io.netty.channel.MessageSizeEstimator