@Substitution(name='groupby')
    @Appender(_doc_template)
    def backfill(self, limit=None):
        return self.apply(lambda x: x.bfill(limit=limit))
Validates the incoming data and raises a Invalid exception
dataset/ETHPy150Open pydata/pandas/pandas/core/groupby.py/GroupBy.backfill--crossover with--dataset/ETHPy150Open rcbops/glance-buildpackage/glance/registry/db/api.py/validate_image