public IActionResult VerifyOutboundOrderLine(long ixOutboundOrderLine, string sOutboundOrderLine)
        {
            string validationResponse = "";

            if (!_outboundorderlinesService.VerifyOutboundOrderLineUnique(ixOutboundOrderLine, sOutboundOrderLine))
            {
                validationResponse = $"OutboundOrderLine {sOutboundOrderLine} already exists.";
            }
            if (validationResponse != "")
            {
                return(Json(validationResponse));
            }
            else
            {
                return(Json(true));
            }
        }