https://github.com/cglib/cglib/cglib: cglib is a powerful, high performance and quality Code Generation Library, It is used to extend JAVA classes and implements interfaces at runtime. 
interface net.sf.cglib.util.ParallelSorter$Comparer
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: net.sf.cglib.util.ParallelSorter$Comparer
  super_class: java.lang.Object
{
  public abstract int compare(int, int);
    descriptor: (II)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      i     
      j     
}
SourceFile: "ParallelSorter.java"
NestHost: net.sf.cglib.util.ParallelSorter
InnerClasses:
  abstract Comparer = net.sf.cglib.util.ParallelSorter$Comparer of net.sf.cglib.util.ParallelSorter