code: def populateFromRow(self, referenceRecord):
          
          self._length = referenceRecord.length
          self._isDerived = bool(referenceRecord.isderived)
          self._md5checksum = referenceRecord.md5checksum
          species = referenceRecord.species
          if species is not None and species != 'null':
              self.setSpeciesFromJson(species)
          self._sourceAccessions = json.loads(referenceRecord.sourceaccessions)
          self._sourceDivergence = referenceRecord.sourcedivergence
          self._sourceUri = referenceRecord.sourceuri
docs: Populates this reference from the values in the specified DB row.