     /// - Parameters:
     ///   - withFormat: visual Format language
     ///   - views: array of views which will be accessed starting with index 0 (example: [v0], [v1], [v2]..)
-    @available(iOS 9, *) func addConstraints(withFormat: String, views: UIView...) {
+    func addConstraints(withFormat: String, views: UIView...) {
         // https://videos.letsbuildthatapp.com/
         var viewsDictionary: [String: UIView] = [:]
         for (index, view) in views.enumerated() {

    }

    /// SwifterSwift: Anchor all sides of the view into it's superview.
    @available(iOS 9, *)
    func fillToSuperview() {
        // https://videos.letsbuildthatapp.com/
        translatesAutoresizingMaskIntoConstraints = false

    /// SwifterSwift: Anchor center Y into current view's superview with a constant margin value.
    ///
    /// - Parameter withConstant: constant of the anchor constraint (default is 0).
    func anchorCenterYToSuperview(constant: CGFloat = 0) {
        // https://videos.letsbuildthatapp.com/
        translatesAutoresizingMaskIntoConstraints = false
