showModal function
Implementation
Future<void> showModal(BuildContext context, Widget widget) async {
  await showModalBottomSheet<Widget>(
    context: context,
    builder: (BuildContext context) {
      return widget;
    },
  );
}Future<void> showModal(BuildContext context, Widget widget) async {
  await showModalBottomSheet<Widget>(
    context: context,
    builder: (BuildContext context) {
      return widget;
    },
  );
}