def extend_policy_target_group_dict(self, session, result):
        for driver in self.ordered_ext_drivers:
            driver.obj.extend_policy_target_group_dict(session, result)
Call all extension drivers to extend PTG dictionary.
dataset/ETHPy150Open openstack/group-based-policy/gbpservice/neutron/services/grouppolicy/extension_manager.py/ExtensionManager.extend_policy_target_group_dict