private List<DataTuple> getWorkingCopyTuples(DatasetVersion datasetVersion)
{
// effective tuples of the working copy are similar to latest checked in version. They are in DataTuples table but they belong to the latest and previous versions
List<Int64> versionIds = getPreviousVersionIds(datasetVersion);
List<DataTuple> tuples = (versionIds == null || versionIds.Count() <= 0) ? new List<DataTuple>() : DataTupleRepo.Get(p => versionIds.Contains(((DataTuple)p).DatasetVersion.Id)).ToList();
return (tuples);
}