     
     func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
         if interactiveTransition == nil {
-            fatalError("Invalid 'interactiveTransition' value. This property should not be nil")
+            fatalError("Invalid interactiveTransition value. This property should not be nil")
         }
         interactiveTransition.present = true
         

            if self.tapRecognizer == nil {

                guard toViewController is MenuViewController else {
                    fatalError("Invalid 'toViewController' type. It must be MenuViewController")
                }
                self.tapRecognizer = UITapGestureRecognizer(target: toViewController,
                                                            action: #selector(MenuViewController.handleTap(recognizer:)))

        let totalWidth = screenWidth - options.visibleContentWidth

        guard let contentSnapshotView = self.contentSnapshotView else {
            fatalError("Invalid contentSnapshotView value. This property should not be nil")
        }
        
        if present {
