static string fillRatePct(SingleTransitLayoutDocument document)
        {
            var rate    = document.Data.Attributes.PackingResult.FillRate * 100;
            var rateStr = rate.ToString("F2", CultureInfo.InvariantCulture);

            return($"{rateStr} %");
        }
            static string completeness(SingleTransitLayoutDocument document)
            {
                var isComplete = document.Data.Attributes.PackingResult.IsComplete;

                return(isComplete ? "COMPLETE" : "INCOMPLETE");
            }