         }
     }
     
-    public override func prepareForInterfaceBuilder() {
+    open override func prepareForInterfaceBuilder() {
         super.prepareForInterfaceBuilder()
     }
     
     // IBInspectable should support UIFont: http://www.openradar.me/22835760
     // @IBInspectable
-    public var timersFont: UIFont! {
+    open var timersFont: UIFont! {
         didSet {
             leftLabel?.font = timersFont
             rightLabel?.font = timersFont

            topSeparatorView?.backgroundColor = newValue
        }
    }
    @IBInspectable public var bottomSeparatorColor: UIColor? {
        get {
            return bottomSeparatorView?.backgroundColor
        }

        setDefaultValues()
    }
    
    fileprivate func setDefaultValues() {
        
        elapsedViewColor = UIColor.gray
        sliderColor = UIColor.darkGray
