@abc.abstractmethod
    def delete_policy(self, context, policy):
A adapter has a pre-hook which increments an integral field in the JSON
dataset/ETHPy150Open openstack/neutron/neutron/services/qos/notification_drivers/qos_base.py/QosServiceNotificationDriverBase.delete_policy--crossover with--dataset/ETHPy150Open ClusterHQ/powerstrip/powerstrip/test/test_core.py/ProxyTests.test_adding_pre_hook_adapter