     open let line = UIView()
     
     /// The line color.
+    @objc
     open var lineColor: UIColor? {
         get {
             return line.backgroundColor

    }
    
    /// A value for the line alignment.
    open var lineAlignment = TabBarLineAlignment.bottom {
        didSet {
            layoutSubviews()

    }
    
    /// The line height.
    @objc
    open var lineHeight: CGFloat {
        get {
            return line.bounds.height
