Как сохранить состояние виджета switch, используя shared preference, на flutter?

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import 'package:shared_preferences/shared_preferences.dart';

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SharedPreferences prefs = await SharedPreferences.getInstance();

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bool isSwitched = false; // замените false на текущее состояние вашего виджета Switch

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await prefs.setBool('switchValue', isSwitched);

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bool switchValue = prefs.getBool('switchValue') ?? false;

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

class SwitchWidget extends StatefulWidget {
  @override
  _SwitchWidgetState createState() => _SwitchWidgetState();
}

class _SwitchWidgetState extends State<SwitchWidget> {
  bool isSwitched = false;

  @override
  void initState() {
    super.initState();
    _loadSwitchValue();
  }

  Future<void> _loadSwitchValue() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    setState(() {
      isSwitched = prefs.getBool('switchValue') ?? false;
    });
  }

  Future<void> _saveSwitchValue(bool value) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setBool('switchValue', value);
  }

  @override
  Widget build(BuildContext context) {
    return SwitchListTile(
      title: Text('Switch Widget'),
      value: isSwitched,
      onChanged: (value) {
        setState(() {
          isSwitched = value;
          _saveSwitchValue(value);
        });
      },
    );
  }
}