static void PopulatePopup_cb(IntPtr inst, IntPtr menu, IntPtr app_info)
 {
     try {
         AppChooserWidget __obj = GLib.Object.GetObject(inst, false) as AppChooserWidget;
         __obj.OnPopulatePopup(GLib.Object.GetObject(menu) as Gtk.Menu, GLib.AppInfoAdapter.GetObject(app_info, false));
     } catch (Exception e) {
         GLib.ExceptionManager.RaiseUnhandledException(e, false);
     }
 }
 static void ApplicationActivated_cb(IntPtr inst, IntPtr app_info)
 {
     try {
         AppChooserWidget __obj = GLib.Object.GetObject(inst, false) as AppChooserWidget;
         __obj.OnApplicationActivated(GLib.AppInfoAdapter.GetObject(app_info, false));
     } catch (Exception e) {
         GLib.ExceptionManager.RaiseUnhandledException(e, false);
     }
 }