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$Handle
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.netty.channel.MessageSizeEstimator$Handle
  super_class: java.lang.Object
{
  public abstract int size(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      msg   
}
SourceFile: "MessageSizeEstimator.java"
NestHost: io.netty.channel.MessageSizeEstimator
InnerClasses:
  public abstract Handle = io.netty.channel.MessageSizeEstimator$Handle of io.netty.channel.MessageSizeEstimator