import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CupertinoApp(
      title: 'Cupertino App',
      home: CupertinoPageScaffold(
        child: CupertinoScrollbar(
          child: ListView.builder(
            itemCount: 100,
            itemBuilder: (BuildContext context, int index) {
              return Card(
                child: Text('child #$index'),
              );
            },
          ),
        ),
      ),
    );
  }
}