@Override
    public void unSubscribeAllTransactionTopic(ProxyContext ctx, String group) {
        groupClusterData.remove(group);
    }
@Test
    public void testUnSubscribeAllTransactionTopic() {
        this.clusterTransactionService.addTransactionSubscription(ctx, GROUP, TOPIC);
        this.clusterTransactionService.unSubscribeAllTransactionTopic(ctx, GROUP);

        assertEquals(0, this.clusterTransactionService.getGroupClusterData().size());
    }