def tearDown(self):
        super(SimpleInstanceTest, self).tearDown()
        CONF.network_label_regex = self.orig_conf
        CONF.ip_start = None
def toggle_ignoring_sigint_v2_engine(cls, toggle: bool) -> None:
        assert cls._signal_handler is not None
        cls._signal_handler._toggle_ignoring_sigint_v2_engine(toggle)