如何使用flutter NestedScrollView？

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

class MyNestedScrollView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('NestedScrollView Example'),
      ),
      body: NestedScrollView(
        headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
          return <Widget>[
            SliverAppBar(
              title: Text('Header'),
              pinned: true,
              floating: true,
              forceElevated: innerBoxIsScrolled,
            ),
          ];
        },
        body: ListView.builder(
          itemCount: 100,
          itemBuilder: (BuildContext context, int index) {
            return ListTile(
              title: Text('Item $index'),
            );
          },
        ),
      ),
    );
  }
}