def extend_network_service_policy_dict(self, session, result):
        for driver in self.ordered_ext_drivers:
            driver.obj.extend_network_service_policy_dict(session, result)
Converts the "backend_uri" into a cache scheme ('db', 'memcached', etc), a
dataset/ETHPy150Open openstack/group-based-policy/gbpservice/neutron/services/grouppolicy/extension_manager.py/ExtensionManager.extend_network_service_policy_dict--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/core/cache/__init__.py/parse_backend_uri