def set_upstream(self, task_or_task_list):
        self._set_relatives(task_or_task_list, upstream=True)
*Abstract Method* 
dataset/ETHPy150Open airbnb/airflow/airflow/models.py/BaseOperator.set_upstream--crossover with--dataset/ETHPy150Open rlpy/rlpy/rlpy/Representations/Representation.py/Representation.featureType