public SortedDictionary <string, string[]> ComparePopularityTransfers(
PopularityTransferData oldData,
PopularityTransferData newData)
{
// Ignore case changes in popularity transfers.
var stopwatch = Stopwatch.StartNew();
var result = CompareData(
oldData,
newData,
"package ID",
"popularity transfers",
StringComparer.OrdinalIgnoreCase);
stopwatch.Stop();
_telemetryService.TrackPopularityTransfersSetComparison(oldData.Count, newData.Count, result.Count, stopwatch.Elapsed);
return(result);
}