def get_field_identifier(self):
        return self.field.get_identifier()
return a pass thru
dataset/ETHPy150Open ambitioninc/django-query-builder/querybuilder/fields.py/MultiField.get_field_identifier--crossover with--dataset/ETHPy150Open pydata/pandas/pandas/core/groupby.py/SeriesGroupBy._apply_to_column_groupbys