是否可以在Flutter中隐藏/显示BottomNavigationBar中的项目？

import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool isHidden = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter BottomNavigationBar'),
      ),
      body: Center(
        child: Text(
          'Content',
          style: TextStyle(fontSize: 24),
        ),
      ),
      bottomNavigationBar: BottomNavigationBar(
        items: buildBottomNavBarItems(),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          setState(() {
            isHidden = !isHidden;
          });
        },
        child: Icon(Icons.visibility),
      ),
    );
  }

  List<BottomNavigationBarItem> buildBottomNavBarItems() {
    if (isHidden) {
      return [
        BottomNavigationBarItem(
          icon: Icon(Icons.home),
          label: 'Home',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.settings),
          label: 'Settings',
        ),
      ];
    } else {
      return [
        BottomNavigationBarItem(
          icon: Icon(Icons.home),
          label: 'Home',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.search),
          label: 'Search',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.settings),
          label: 'Settings',
        ),
      ];
    }
  }
}