.swift

struct ContentView: View {
    
    let customers = ["Alex", "Mary", "John"]
    @State var selectedCustomer: String?
    
    var body: some View {
        NavigationView {
            VStack {
                    
                // get the selected customer
                CustomerListView(customers: customers) { (customer) in
                    selectedCustomer = customer
                }
                
                // only display the customers
                CustomerListView(customers: customers)
                
                
            }
            
            
            .navigationTitle("Customers")
        }
        
    }
}