In a namespace there could be a base controller named  according to the namespace

== Classic way ==

  app/controllers/admin/application.php - class ApplicationController extends Atk14Controller
  app/controllers/admin/logins_controller.php - class LoginsController extends ApplicationController

== New way ==

  app/controllers/admin/admin.php - class AdminController extends Atk14Controller
  app/controllers/admin/logins_controller.php - classs LoginsController extends AdminController