class ViewController: UIViewController {

  // 💡 Step.1 Put BureauController
  private let bureauController = BureauController()

  override func viewDidLoad() {
    super.viewDidLoad()

    // 💡 Step.2 Set the viewController as an owner.
    bureauController.setOwner(viewController: self)

    // 💡 Step.3 Create an instance of your custom input view.
    let yourCustomInputView = ...

    // 💡 Step.4 To display your input view, do followings.
    bureauController.containerView.addSubviewToEdges(view: yourCustomInputView)

    // 💡 Step.5 Finally, Let's try to show it.
    bureauController.show()

  }
}