     updateFollowers(scrollDelta)
   }
 
-    var _originalTabBar:UITabBar?
+    var sourceTabBar:UITabBar?
     private func updateFollowers(_ delta: CGFloat) {
         followers.forEach {
             guard let tabBar = $0 as? UITabBar


  private func updateSizing(_ delta: CGFloat) {
    guard let topViewController = self.topViewController else { return }

    var frame = navigationBar.frame

    // Move the navigation bar
    frame.origin = CGPoint(x: frame.origin.x, y: frame.origin.y - delta)
    navigationBar.frame = frame

            }
            tabBar.isTranslucent = true
            tabBar.frame.origin.y += delta * 1.5

            //We take back the bar to it's original state if it is in its original position
            if let originalTabBar = sourceTabBar {
                if originalTabBar.frame.origin.y == tabBar.frame.origin.y {
                    tabBar.isTranslucent = originalTabBar.isTranslucent
                }
