settingsControllerProvider top-level property
Provider for the settings controller.
Override in your app with the controller from initializeSettings().
For the ref extension (ref.settings, ref.watchSetting) to work,
override all three: settingsControllerProvider, settingsSearchIndexProvider,
and settingsProvidersProvider with the same SettingsProviders instance.
Implementation
final settingsControllerProvider = Provider<SettingsController>((ref) {
throw UnimplementedError(
'settingsControllerProvider must be overridden. '
'Use initializeSettings() and override with the returned instance.',
);
});