code: def populateFromRow(self, referenceSetRecord):
          
          self._dataUrl = referenceSetRecord.dataurl
          self._description = referenceSetRecord.description
          self._assemblyId = referenceSetRecord.assemblyid
          self._isDerived = bool(referenceSetRecord.isderived)
          self._md5checksum = referenceSetRecord.md5checksum
          species = referenceSetRecord.species
          if species is not None and species != 'null':
              self.setSpeciesFromJson(species)
          self._sourceAccessions = json.loads(
              referenceSetRecord.sourceaccessions)
          self._sourceUri = referenceSetRecord.sourceuri
docs: Populates this reference set from the values in the specified DB
          row.