library guru_utils; import 'package:guru_utils/auth/auth_credential_manager.dart'; typedef ToastDelegate = void Function(String message, {Duration duration}); class GuruUtils { static ToastDelegate? toastDelegate; static String? flavor; static bool isTablet = false; static void showToast(String message, {Duration duration = const Duration(seconds: 3)}) { toastDelegate?.call(message, duration: duration); } }