def _get_version_hist(self):
    if self.__versioning__ == VersioningTypes.NONE:
        return None
    elif self.__versioning__ == VersioningTypes.DELTA_HISTORY:
        return getattr(self, '_version_hist', list())
    else:
        raise ValueError("Unknown versioning type")
dataset/ETHPy150Open memphis-iis/GLUDB/gludb/simple.py/_get_version_hist/original