如何创建不对称过渡？

struct ContentView: View {
    @State private var showDetails = false

    var body: some View {
        VStack {
            Button("Press to show details") {
                withAnimation {
                    showDetails.toggle()
                }
            }

            if showDetails {
                Text("Details go here.")
                    .transition(.asymmetric(insertion: .move(edge: .leading), removal: .move(edge: .bottom)))
            }
        }

    }
}