public static void init(String applicationId, String transactionServiceGroup) {
        init(applicationId, transactionServiceGroup, null, null);
    }
@Test
    public void testInit() {
        TMClient.init(APPLICATION_ID, SERVICE_GROUP);
        TmNettyRemotingClient tmNettyRemotingClient = TmNettyRemotingClient.getInstance();
        Assertions.assertEquals(tmNettyRemotingClient.getTransactionServiceGroup(), SERVICE_GROUP);
    }