init static method
Initializes shared preferences instance.
Implementation
static Future<void> init() async {
_prefs = await SharedPreferences.getInstance();
/// Reloads the shared preferences instance in the case modifications
/// were made in the native code, after a notification action.
_fgbgSubscription =
FGBGEvents.instance.stream.listen((event) => _prefs.reload());
_initialized = true;
}