def _unset_interface(self):
    self.__interface = YANGDynClass(base=six.text_type, is_leaf=True, yang_name='interface', parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, namespace='http://openconfig.net/yang/interfaces/ip', defining_module='openconfig-if-ip', yang_type='leafref', is_config=True)
def _unset_interface(self):
    self.__interface = YANGDynClass(base=six.text_type, is_leaf=True, yang_name='interface', parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, namespace='http://openconfig.net/yang/interfaces/ip', defining_module='openconfig-if-ip', yang_type='leafref', is_config=True)