如何在Flutter中更新ListView.separated？

import 'package:flutter/material.dart';

class MyListView extends StatefulWidget {
  @override
  _MyListViewState createState() => _MyListViewState();
}

class _MyListViewState extends State<MyListView> {
  List<String> items = ['Item 1', 'Item 2', 'Item 3'];

  @override
  Widget build(BuildContext context) {
    return ListView.separated(
      itemCount: items.length,
      separatorBuilder: (BuildContext context, int index) => Divider(),
      itemBuilder: (BuildContext context, int index) {
        return ListTile(
          title: Text(items[index]),
        );
      },
    );
  }

  void updateListView() {
    setState(() {
      // 更新数据
      items = ['Item 1', 'Item 2', 'Item 3', 'Item 4'];
    });
  }
}