Routing-FriendsModule.swift

final class FriendsRouter: Router<FriendsViewController>, FriendsRouter.Routes  {
    typealias Routes = ProfileRoute & /* other routes */ 
}

final class FriendsViewController: UIViewController {

    private let router: FriendsRouter.Routes

    init(router: FriendsRouter.Routes) {
        self.router = router
        super.init(nibName: nil, bundle: nil)
    }
  
    func userButtonPressed() {
        router.openProfile(for: /* some user */)
    }
}