interface sun.nio.ch.Groupable
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.nio.ch.Groupable
  super_class: java.lang.Object
{
  public abstract sun.nio.ch.AsynchronousChannelGroupImpl group();
    descriptor: ()Lsun/nio/ch/AsynchronousChannelGroupImpl;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "Groupable.java"