     // Append embedded view to container view's view hierachy
     open var topViewController: UIViewController? {
         willSet(newValue) {
-            self.shouldshowTopViewController = newValue != nil
+            self.shouldShowTopViewController = newValue != nil
             guard let viewController = newValue else {
                 return
             }

    }
    open var rightViewController: UIViewController? {
        willSet(newValue) {
            self.shouldShowRightviewController = newValue != nil
            guard let viewController = newValue else {
                return
            }

    fileprivate var rightContainerOffset: CGVector!
    
    // setting them to NO disables swiping to the view controller, try it!
    open var shouldShowTopViewController = true
    open var shouldShowBottomViewController = true
    open var shouldShowLeftViewController = true
    open var shouldShowRightViewController = true
    open var shouldShowCenterViewController = true
    
    fileprivate let swipeAnimateDuration = 0.2
    
