struct ToggleView: View {

    var flag: Binding<Bool> = .init(getValue: { () -> Bool in
        print(">>> getting")
        return false
    }, setValue: { (value) in
        print(">>> settting", value)
    })

    var body: some View {
         VStack {
            Toggle(isOn: flag) {
                Text("Toggle#1")
            }
            Toggle(isOn: flag) {
                Text("Toggle#2")
            }
        }.padding()
    }
}