@Override
    public boolean cleanUnusedTopic(String cluster) throws RemotingConnectException, RemotingSendRequestException,
        RemotingTimeoutException, MQClientException, InterruptedException {
        return defaultMQAdminExtImpl.cleanUnusedTopic(cluster);
    }
@Test
    public void testCleanUnusedTopic() throws InterruptedException, RemotingTimeoutException, MQClientException, RemotingSendRequestException, RemotingConnectException {
        boolean result = defaultMQAdminExt.cleanUnusedTopic("default-cluster");
        assertThat(result).isFalse();
    }