ViewModels.swift

// OrderViewModelRepresentable.swift
protocol OrderViewModelRepresentable {
    var title: String { get }
}

// OrdersViewModel.swift
struct OrdersViewModel: OrderViewModelRepresentable {
    fileprivate var order: Order
    
    init(model: Order) {
        self.order = model
    }
    
    var title: String {
        return "Name:\(self.order.name)\nDescription:\(self.order.description)\nPrice:\(self.order.price)"
    }
}

// OrdersViewModel.swift
struct CompletedOrderViewModel: OrderViewModelRepresentable {
    fileprivate var completedOrder: CompletedOrder
    init(model: CompletedOrder) {
        self.completedOrder = model
    }
    
    var title: String {
        let completedOrderText = "Name:\(self.completedOrder.name)\nDescription:\(self.completedOrder.description)\nPrice:\(self.completedOrder.price)\nRating:\(self.completedOrder.userRating)"
        return completedOrderText
    }
}