static void CopyText_cb(IntPtr inst, int start_pos, int end_pos)
 {
     try {
         IEditableTextImplementor __obj = GLib.Object.GetObject(inst, false) as IEditableTextImplementor;
         __obj.CopyText(start_pos, end_pos);
     } catch (Exception e) {
         GLib.ExceptionManager.RaiseUnhandledException(e, false);
     }
 }