def get_data_fields(self, **kwargs):
        return []
Deletes empty files and returns filenames minus the deleted ones.
dataset/ETHPy150Open hydroshare/hydroshare2/ga_resources/drivers/__init__.py/Driver.get_data_fields--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/datastore_admin/backup_handler.py/drop_empty_files