https://openjdk.java.net/ 
public interface sun.awt.X11.InfoWindow$Balloon$LiveArguments extends sun.awt.X11.InfoWindow$LiveArguments
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.awt.X11.InfoWindow$Balloon$LiveArguments
  super_class: java.lang.Object
{
  public abstract java.lang.String getActionCommand();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "InfoWindow.java"
NestHost: sun.awt.X11.InfoWindow
InnerClasses:
  public Balloon = sun.awt.X11.InfoWindow$Balloon of sun.awt.X11.InfoWindow
  public abstract LiveArguments = sun.awt.X11.InfoWindow$Balloon$LiveArguments of sun.awt.X11.InfoWindow$Balloon
  private abstract LiveArguments = sun.awt.X11.InfoWindow$LiveArguments of sun.awt.X11.InfoWindow