def get_sort_fields(self, model):
        return self.get_db_sources(model)
Used by actor (owner) to rewind port peeking to front token.
dataset/ETHPy150Open pivotal-energy-solutions/django-datatable-view/datatableview/columns.py/Column.get_sort_fields--crossover with--dataset/ETHPy150Open EricssonResearch/calvin-base/calvin/actor/actorport.py/InPort.commit_peek_as_read