public IEnumerable <IOrder> GetOrders([Service] OrdersResolver resolver, string ids)
        {
            if (string.IsNullOrWhiteSpace(ids))
            {
                return(new List <IOrder>());
            }

            return(resolver.GetOrders(ids));
        }
 public async Task <IOrder> GetOrder([Service] OrdersResolver resolver, string orderId)
 {
     return(await resolver.GetOrder(orderId));
 }