def getCallSet(self, id_):
        """
        Returns a CallSet with the specified id, or raises a
        CallSetNotFoundException if it does not exist.
        """
        if id_ not in self._callSetIdMap:
            raise exceptions.CallSetNotFoundException(id_)
        return self._callSetIdMap[id_]
dataset/ETHPy150Open ga4gh/server/ga4gh/datamodel/variants.py/AbstractVariantSet.getCallSet/original