def METHOD_NAME(self):
    """
    Checks if this is a last_updated request and if so annotates and orders
    the queryset by the last_updated field so that the ballots with oldest
    changes appear first.
    This is to help the importer from WCIVF deal with situations where a
    large number of ballots have been updated at the same time e.g. through
    a data migration which saves many or all objects.
    """
    queryset = super().METHOD_NAME()
    if self.request.query_params.get("last_updated"):
        queryset = queryset.with_last_updated()
    return queryset