main.dart

enum Animal {
  Cat,
  Dog,
}

hello(Animal animal) {
  return switch (animal) {
      Animal.Cat => 'is Cat',
      Animal.Dog => 'is Dog',
  };
}

sealed class ScreenParams {}
class CreateParams implements ScreenParams {
  final String name;
  CreateParams({
    required this.name,
  });
}
class UpdateParams implements ScreenParams {
  final String id;
  final String? name;
  UpdateParams({
    required this.id,
    this.name,
  });
}

void main() {
  print(hello(Animal.Cat));
  print(hello(Animal.Dog));
}
/// Console
/// is Cat
/// is Dog