def _finalize(self):
        self.eof = True
        self._close_unreader()
transforms the supplied row and evaluates columns of different types
dataset/ETHPy150Open benoitc/restkit/restkit/tee.py/ResponseTeeInput._finalize--crossover with--dataset/ETHPy150Open pboehm/django-data-migration/data_migration/migration.py/Migration.transform_row_dataset