def empty(self):
        return self.child_count() == 0
Overriding this is a bit of a dirty-hack, but we really don't want
dataset/ETHPy150Open openstack/taskflow/taskflow/types/tree.py/Node.empty--crossover with--dataset/ETHPy150Open pandaproject/panda/panda/api/search_subscriptions.py/SearchSubscriptionResource.save_related