code: def runGetExpressionLevel(self, id_):
          
          compoundId = datamodel.ExpressionLevelCompoundId.parse(id_)
          dataset = self.getDataRepository().getDataset(compoundId.dataset_id)
          rnaQuantificationSet = dataset.getRnaQuantificationSet(
              compoundId.rna_quantification_set_id)
          rnaQuantification = rnaQuantificationSet.getRnaQuantification(
              compoundId.rna_quantification_id)
          expressionLevel = rnaQuantification.getExpressionLevel(compoundId)
          return self.runGetRequest(expressionLevel)
docs: Runs a getExpressionLevel request for the specified ID.