https://openjdk.java.net/ 
public interface sun.awt.X11.XToolkit$XEventListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.awt.X11.XToolkit$XEventListener
  super_class: java.lang.Object
{
  public abstract void eventProcessed(sun.awt.X11.XEvent);
    descriptor: (Lsun/awt/X11/XEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      e     
}
SourceFile: "XToolkit.java"
NestHost: sun.awt.X11.XToolkit
InnerClasses:
  public abstract XEventListener = sun.awt.X11.XToolkit$XEventListener of sun.awt.X11.XToolkit