class SimpleViewController: UIViewController, PanelPresentable {
    
    let panelPresenter = PanelPresenter()
    
    init() {
        super.init(nibName: nil, bundle: nil)
        panelPresenter.viewController = self
    }
}

    private lazy var simpleView: UIView = {
        let view = UIView()
        view.backgroundColor = .systemMint
        return view
    }()
    
    private lazy var cancelButton: UIButton = {
        let button = UIButton(type: .system)
        button.setTitle("Cancel", for: .normal)
        button.addAction(UIAction { [unowned self] _ in
            self.presentingViewController?.dismiss(animated: true)
        }, for: .touchUpInside)
        return button
    }()
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.tintColor = .black
        
        view.addSubview(simpleView)
        topContentView.addSubview(cancelButton)
        
        simpleView.translatesAutoresizingMaskIntoConstraints = false
        cancelButton.translatesAutoresizingMaskIntoConstraints = false
        
        NSLayoutConstraint.activate([
            simpleView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            simpleView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            simpleView.topAnchor.constraint(equalTo: view.topAnchor),
            simpleView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
            simpleView.heightAnchor.constraint(equalToConstant: 200),
            
            cancelButton.leadingAnchor.constraint(equalTo: topContentView.layoutMarginsGuide.leadingAnchor),
            cancelButton.centerYAnchor.constraint(equalTo: topContentView.layoutMarginsGuide.centerYAnchor)
        ])
    }