@Override
    public void shutDown() throws NacosException {
        String className = this.getClass().getName();
        NAMING_LOGGER.info("{} do shutdown begin", className);
        serverListManager.shutdown();
        serverProxy.shutdown();
        ThreadUtils.shutdownThreadPool(executorService, NAMING_LOGGER);
        NAMING_LOGGER.info("{} do shutdown stop", className);
    }
@Test
    void testShutDown() throws NacosException {
        //when
        nacosNamingMaintainService.shutDown();
        //then
        verify(serverProxy, times(1)).shutdown();
        verify(serverListManager, times(1)).shutdown();
        verify(executorService, times(1)).shutdown();
    }