def getVariantSet(self, id_):
        """
        Returns the VariantSet with the specified name, or raises a
        VariantSetNotFoundException otherwise.
        """
        if self._variantSetIdMap not in id_:
            raise exceptions.VariantSetNotFoundException(id_)
        return self._variantSetIdMap[id_]
dataset/ETHPy150Open ga4gh/server/ga4gh/datamodel/datasets.py/AbstractDataset.getVariantSet/swapped operands of `not in`