protocol PersonViewModel {
    var title: String {get}
    var birthday: String {get}
    func doSomeWork()
}

class PersonView: UIView {
    private var titleLabel: UILabel!
    private var birthdayLabel: UILabel!
    private var workButton: UIButton!
    private var viewModel: BobViewModel

    init(viewModel: PersonViewModel) {
        self.viewModel = viewModel
        super.init(frame: .zero)
        setupView()
    }

    private func setupView() {
        titleLabel.text = viewModel.title
        birthdayLabel.text = viewModel.birthday
    }

    func workButtonTapped() {
        viewModel.doSomeWork()
    }

}