public Task <OperationResult <bool> > OrderCancerMaintenanceFlashSaleDataAsync(int orderId) => OperationResult.FromResultAsync <bool>(FlashSaleManager.OrderCancerMaintenanceFlashSaleData(orderId));
public Task <OperationResult <bool> > OrderCancerMaintenanceFlashSaleDataAsync(int orderId) => OperationResult.FromResultAsync <bool>(FlashSaleManager.OrderCancerMaintenanceFlashSaleData(orderId));