      - SeeAlso: restartLabel
      - SeeAlso: controllerViewDidAppear
      */
-    class func controllerViewWillAppear(_ controller: UIViewController) {
+    open class func controllerViewWillAppear(_ controller: UIViewController) {
         MarqueeLabel.restartLabelsOfController(controller)
     }
     

     - SeeAlso: restartLabel
     - SeeAlso: controllerViewWillAppear
     */
    class func controllerViewDidAppear(_ controller: UIViewController) {
        MarqueeLabel.restartLabelsOfController(controller)
    }
    

     - Parameter controller: The view controller for which all `MarqueeLabel` instances should be labelized.
     - SeeAlso: labelize
     */
    open class func controllerLabelsLabelize(_ controller: UIViewController) {
        MarqueeLabel.notifyController(controller, message: .Labelize)
    }
    
