https://openjdk.java.net/ 
public interface javax.swing.plaf.basic.DragRecognitionSupport$BeforeDrag
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.swing.plaf.basic.DragRecognitionSupport$BeforeDrag
  super_class: java.lang.Object
{
  public abstract void dragStarting(java.awt.event.MouseEvent);
    descriptor: (Ljava/awt/event/MouseEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      me    
}
SourceFile: "DragRecognitionSupport.java"
NestHost: javax.swing.plaf.basic.DragRecognitionSupport
InnerClasses:
  public abstract BeforeDrag = javax.swing.plaf.basic.DragRecognitionSupport$BeforeDrag of javax.swing.plaf.basic.DragRecognitionSupport