product_row_item.dart

class ProductListTab extends StatelessWidget {
 @override
 Widget build(BuildContext context) {
   return CupertinoPageScaffold(
     child: Consumer<AppStateModel>(
       builder: (context, child, model) {
         final products = model.getProducts();  // NEW
         return CustomScrollView(
           semanticChildCount: products.length, // NEW
           slivers: <Widget>[
             CupertinoSliverNavigationBar(
               largeTitle: const Text('Cupertino Store'),
             ),
           ],
         );
       },
     ),
   );
 }
}