         case type(type: PagingMenuViewCell.Type)
     }
     
-    /// If contentSize.width is not over safe area, paging menu view applys this value to each the cells.
+    /// If contentSize.width is not over safe area, paging menu view applys this value to each thecells.
     ///
     /// - center: centering each PagingMenuViewCell object.
     /// - left: aligning each PagingMenuViewCell object on the left side.

    @available(iOS 11.0, *)
    public override func safeAreaInsetsDidChange() {
        super.safeAreaInsetsDidChange()
        align()
    }
    
    deinit {

    }

    /// If contentSize.width is not over safe area, paging menu view applys cellAlignment to each the cells.
    private func alignContainerViewIfNeeded() {
        let safedViewWidth = bounds.width - contentSafeAreaInsets.horizontal
        let hasScrollableArea = safedViewWidth < contentSize.width
        
