UITabBar is missing mixedBarStyle property?

[halleygen]

Not sure if I'm missing something but I think that UITabBars don't have a mixedBarStyle property. The only way I can get this to work is by adding the following code (taken from NightNight's UINavigationBar extension) to the Classes/UIKit/UITabBar+Mixed.swift file.

public extension UITabBar {
    fileprivate struct AssociatedKeys {
        static var mixedBarStyleKey = "mixedBarStyleKey"
    }
    
    public var mixedBarStyle: MixedBarStyle? {
        get {
            return objc_getAssociatedObject(self, &AssociatedKeys.mixedBarStyleKey) as? MixedBarStyle
        }
        set {
            objc_setAssociatedObject(self, &AssociatedKeys.mixedBarStyleKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
            
            addNightObserver(#selector(_updateBarStyle))
        }
    }
    
    func _updateBarStyle() {
        if let mixedBarStyle = mixedBarStyle {
            barStyle = mixedBarStyle.unfold()
        }
    }
    
}

Is there another way of giving a MixedBarStyle to a UITabBar or was it accidentally left out of the code?