         }
     }
     
-    fileprivate func setUpAppearance() {
+    private func setUpAppearance() {
         
         self.keylineView?.backgroundColor = self.keylineColor
         
         self.updateBackgroundStyle(self.backgroundStyle)
     }
     
-    fileprivate func updateBackgroundStyle(_ newStyle: BackgroundStyle) {
+    private func updateBackgroundStyle(_ newStyle: BackgroundStyle) {
         if let backgroundContainer = self.backgroundContainer {
             
             // clear subviews

    /**
     The action button on the layout
     */
    @IBOutlet open weak var actionButton: UIButton? {
        willSet {
            if let actionButton = newValue {
                actionButton.addTarget(self,

        }
    }
    
    private func updateDisplayStyle(_ displayStyle: DisplayStyle) {
        
        switch displayStyle {
        case .roundRectangle:
