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struct History: View { var busId : String var body: some View { ZStack{ ScrollView(.vertical, showsIndicators: false){ VStack(alignment: .leading){ Text("Something") } } } } class getHistory: ObservableObject { @Published var data = [history]() init() { let db = Firestore.firestore() db.collection("Bus").document(/* Here i want to implement busId, but i can't. Please help me */).collection("Tanggal").addSnapshotListener{(snap, error) in } } }}struct history: Identifiable { var id : String var day : String}