https://source.android.com/ 
public interface android.gesture.GestureOverlayView$OnGesturingListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.gesture.GestureOverlayView$OnGesturingListener
  super_class: java.lang.Object
{
  public abstract void onGesturingStarted(android.gesture.GestureOverlayView);
    descriptor: (Landroid/gesture/GestureOverlayView;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
         Name  Flags
      overlay  

  public abstract void onGesturingEnded(android.gesture.GestureOverlayView);
    descriptor: (Landroid/gesture/GestureOverlayView;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
         Name  Flags
      overlay  
}
SourceFile: "GestureOverlayView.java"
NestHost: android.gesture.GestureOverlayView
InnerClasses:
  public abstract OnGesturingListener = android.gesture.GestureOverlayView$OnGesturingListener of android.gesture.GestureOverlayView