public IActionResult ChangeQuantity(int orderGroupId, int shipmentId, int lineItemId, decimal quantity, OrderDetailsPage currentPage)
{
var issues = _ordersService.ChangeLineItemQuantity(orderGroupId, shipmentId, lineItemId, quantity);
var model = GetModel(orderGroupId, currentPage);
model.ErrorMessage = GetValidationMessages(issues);
return(PartialView("Index", model));
}