code: def getRnaQuantificationById(self, rnaQuantificationId):
          
          sql = ("SELECT * FROM RnaQuantification WHERE id = ?")
          query = self._dbconn.execute(sql, (rnaQuantificationId,))
          try:
              return sqlite_backend.fetchOne(query)
          except AttributeError:
              raise exceptions.RnaQuantificationNotFoundException(
                  rnaQuantificationId)
docs: :param rnaQuantificationId: the RNA Quantification ID
          :return: dictionary representing an RnaQuantification object,
              or None if no match is found.