public void actionPerformed(final ActionEvent e) {
final ModeController modeController = Controller.getCurrentModeController();
final Controller controller = modeController.getController();
final NodeModel selected = controller.getSelection().getSelected();
if (selected.depth() < 2) {
UITools.errorMessage(TextUtils.getText("can_not_delete_style_group"));
return;
}
final MapModel map = selected.getMap();
final MapStyleModel styleModel = MapStyleModel.getExtension(map);