code: def addIndividual(self):
          
          self._openRepo()
          dataset = self._repo.getDatasetByName(self._args.datasetName)
          individual = bio_metadata.Individual(
              dataset, self._args.individualName)
          individual.populateFromJson(self._args.individual)
          self._updateRepo(self._repo.insertIndividual, individual)
docs: Adds a new individual into this repo