def _handle_default(k, v=None):
    this_mapping = deepcopy(DEFAULTS[k])
    if v is not None:
        if isinstance(v, dict):
            this_mapping.update(v)
        else:
            for key in this_mapping.keys():
                this_mapping[key] = v
    return this_mapping
This routine is overridden to disable ordering for aggregate
dataset/ETHPy150Open mne-tools/mne-python/mne/defaults.py/_handle_default--crossover with--dataset/ETHPy150Open dcramer/django-compositepks/django/contrib/gis/db/models/sql/query.py/GeoQuery.get_ordering