             self.pageViewController?.scrollView?.delegate = self
         }
     }
+    
     
     // MARK: Scrolling
     

    /// The active transition operation.
    internal var activeTransition: TransitionOperation?
    
    internal var viewControllerCount: Int?
    internal var viewControllerMap = IndexedMap<WeakWrapper<UIViewController>>()
    public var pageCount: Int? {
        return viewControllerCount
    }
    
    /// The page index that the page view controller is currently at.
    public internal(set) var currentIndex: PageIndex? {

    }
    
    
    // MARK: Properties
    
    internal var pageViewController: UIPageViewController?
