// ViewController
protocol _DisplayLogic: class
_viewController: _DisplayLogic

// Interactor
 protocol _InteractorBusinessLogic
_Interactor: _InteractorBusinessLogic

// Presenter
 protocol _PresentationLogic
 _Presenter: _PresentationLogic


// Router
 @objc protocol _RoutingLogic
 protocol _DataPassing

_Router: NSObject
_Router: _RoutingLogic
_Router: _DataPassing

weak var viewController: _ViewController?

// ViewController
var interactor: _InteractorBusinessLogic?
var router: (NSObjectProtocol & _RoutingLogic & _DataPassing)?

 private func setup() {

 let viewController = self
 let interactor = _Interactor()
 let presenter = _Presenter()
 let router = _Router()
 viewController.interactor = interactor
 viewController.router = router
 interactor.presenter = presenter
 presenter.viewController = viewController
 router.viewController = viewController
 }

// Interactor
var presenter: _PresentationLogic?

// Presenter
weak var viewController: _DisplayLogic?