def on_tracked_models_cleared(self, model_class=None):
        pass
Get all Volumes associated with the current credentials.
dataset/ETHPy150Open dimagi/commcare-hq/corehq/form_processor/track_related.py/TrackRelatedChanges.on_tracked_models_cleared--crossover with--dataset/ETHPy150Open darcyliu/storyboard/boto/ec2/connection.py/EC2Connection.get_all_volumes