main.dart

void main() {
//   fetchUserOrder()
//       .then((value) => print(value))
//       .catchError((error) => print(error));
  
    fetchUserOrder()
      .then((value) => print(value))
      .catchError((error) => showButton());
}

Future<String> fetchUserOrder() {
  return Future.error(
      "This is the error");
}

Future<String> showButton() {
  return Future<String>.value('Back to the future!');
}

f