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.util.Mapping<IN, OUT>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.netty.util.Mapping
  super_class: java.lang.Object
{
  public abstract OUT map();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TIN;)TOUT;
    MethodParameters:
       Name  Flags
      input  
}
Signature: <IN:Ljava/lang/Object;OUT:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "Mapping.java"