@Override
    public void unsubscribe(String serviceName, String groupName, String clusters) throws NacosException {
        NAMING_LOGGER.debug("[UNSUBSCRIBE-SERVICE] service:{}, group:{}, cluster:{} ", serviceName, groupName,
                clusters);
        serviceInfoUpdateService.stopUpdateIfContain(serviceName, groupName, clusters);
        grpcClientProxy.unsubscribe(serviceName, groupName, clusters);
    }
@Test
    void testUnsubscribe() throws NacosException {
        String serviceName = "service1";
        String groupName = "group1";
        String clusters = "cluster1";
        delegate.unsubscribe(serviceName, groupName, clusters);
        verify(mockGrpcClient, times(1)).unsubscribe(serviceName, groupName, clusters);
    }