// 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?