public AdoptPuppyUseCase(HappyPuppyRepository repo) : base(repo) { }
public UseCase(HappyPuppyRepository repo) { this.repo = repo; }
public ListPuppiesUseCase(HappyPuppyRepository repo) : base(repo) { }
public ListOwnersUseCase(HappyPuppyRepository repo) : base(repo) { }
public DisplayListUseCase(HappyPuppyRepository repo) : base(repo) { }