# BasicAppbar class BasicAppbar extends StatelessWidget implements PreferredSizeWidget { const BasicAppbar(this.text, {super.key}); final String? text; @override AppBar build(BuildContext context) { return AppBar( leading: const AppbarLeading(), title: HeadlineMedium(text), ); } @override Size get preferredSize => const Size.fromHeight(kToolbarHeight); } - [[AppbarLeading]] - [[HeadlineMedium]]