// A sliver that assigns the role of SemanticsRole.list to its sliver child.
class SliverSemanticsList extends SingleChildRenderObjectWidget {
  const SliverSemanticsList({super.key, required Widget sliver})
    : super(child: sliver);

  @override
  RenderSliverSemanticsList createRenderObject(BuildContext context) =>
      RenderSliverSemanticsList();
}

class RenderSliverSemanticsList extends RenderProxySliver {
  @override
  void describeSemanticsConfiguration(SemanticsConfiguration config) {
    super.describeSemanticsConfiguration(config);
    config.role = SemanticsRole.list;
  }
}

SliverSemantics(
  role: SemanticsRole.list
  sliver: SliverFixedExtentList(
    itemExtent: 44.0,
    delegate: SliverChildBuilderDelegate(
      (BuildContext context, int index) {
        return Card(
          child: Padding(
            padding: const EdgeInsets.all(8.0),
            child: Text('Item $index'),
          ),
        );
      },
      childCount: 50,
    ),
  ),
),