 extension MVMediaSlider {
     
     // MARK: UIControl subclassing
-    override public func beginTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
+    override open func beginTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
         
         self.sendActions(for: .touchDown)
 

        }
    }
    
    @IBInspectable public var topSeparatorColor: UIColor? {
        get {
            return topSeparatorView?.backgroundColor
        }

    }

    // MARK: styling
    override open var backgroundColor: UIColor! {
        didSet {
            rightLabelHolder?.backgroundColor = self.backgroundColor
        }
    }
    @IBInspectable open var elapsedViewColor: UIColor? {
        get {
            return leftLabelHolder?.backgroundColor
        }
