How to handle setState in a function ?

I have 2 functions where the user press a button and i save and load the state of that button whenever i need it ,also i store it in sharedPreference.

I want to move that code :

  Future<void> _loadPrivacyPolicyAcceptance() async {
    final prefs = await SharedPreferences.getInstance();
    setState(() {
      _acceptedPrivacyPolicy = prefs.getBool('acceptedPrivacyPolicy') ?? false;
    });
  }

  Future<void> _savePrivacyPolicyAcceptance(bool accepted) async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool('acceptedPrivacyPolicy', accepted);
  }

In a new file where i use only functions and not widgets ,but i can’t use setState without a widget.

How i can handle that behaviour ?