     }
 
     /// SwifterSwift: Anchor center X and Y into current view's superview
-    @available(iOS 9, *)
     func anchorCenterSuperview() {
         // https://videos.letsbuildthatapp.com/
         anchorCenterXToSuperview()

    /// SwifterSwift: Anchor center X into current view's superview with a constant margin value.
    ///
    /// - Parameter constant: constant of the anchor constraint (default is 0).
    @available(iOS 9, *)
    func anchorCenterXToSuperview(constant: CGFloat = 0) {
        // 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
