     weak var layoutBarHeight:NSLayoutConstraint!
     let kBarHeight:CGFloat = 64
     let kBarMinHeight:CGFloat = 20
-    private let kAnimationDurantion:TimeInterval = 0.3
+    private let kAnimationDuration:TimeInterval = 0.3
     
     convenience init(parent:CParent)
     {

        parent.controllers.last?.layoutLeft.constant = delta
        parent.controllers.last?.layoutRight.constant = delta
        
        UIView.animate(withDuration:kAnimationDurantion, animations:
        {
            self.layoutIfNeeded()
        })

        parent.controllers.last?.addShadow()
        bar.push(name:controller.title)
        
        UIView.animate(withDuration:kAnimationDuration, animations:
        {
            self.layoutIfNeeded()
            self.parent.controllers.last?.shadow?.maxAlpha()
