import SuperTabBar

enum MyTab {

    case firstTab
    case secondTab
    case thirdTab

}

extension MyTab: SuperTab {
    ...
}

import SuperTabBar

struct MyView: View {
    
    @State private var selectedTab = MyTab.firstTab
    
    var body: some View {
        SuperTabBar(selection: $selectedTab) {
            Text("First screen")
                .tabItem(for: MyTab.firstTab)
            Text("Second screen")
                .tabItem(for: MyTab.secondTab)
            Text("Third screen")
                .tabItem(for: MyTab.thirdTab)
        }
    }
    
}