import 'package:flutter/material.dart'; class SequentiallyShowUpScope extends StatelessWidget { static SequentiallyShowUpScope of(BuildContext context) => context.findAncestorWidgetOfExactType()!; const SequentiallyShowUpScope({ super.key, required this.child, }); final Widget child; @override Widget build(BuildContext context) { return child; } } class SequentiallyShowUp extends StatelessWidget { const SequentiallyShowUp({ super.key, required this.child, required this.sequence, }); final Widget child; final int sequence; @override Widget build(BuildContext context) { return const Placeholder(); } }