Find the view's recursively with Generics

    private func getSubviewsOf<T : UIView>(view:UIView) -> [T] {
        var subviews = [T]()

        for subview in view.subviews {
            subviews += getSubviewsOf(view: subview) as [T]

            if let subview = subview as? T {
                subviews.append(subview)
            }
        }

        return subviews
    }