Cannot use/access Array.count in Kotlin compile

[davidakoontz]

I don't understand this error message; Kotlin compiler doesn't like

let itemCount: Int = items.count

Items is a parameter an Array of Item. So the Array.count var should be available - right?

func shuffleAsync<Item>(_ items: Binding<[Item]>, times: Int? = nil) async {

Any ideas what I'm doing wrong?