private void printTopicSubscriptions(Map<ByteString, SubscriptionData> states) { System.out.println(">>> Subscription Info <<<"); if (0 == states.size()) { System.out.println("No subscriber."); return; } for (Map.Entry<ByteString, SubscriptionData> entry : states.entrySet()) { System.out.println( "Subscriber " + entry.getKey().toStringUtf8() + " : " + SubscriptionStateUtils.toString(entry.getValue())); } System.out.println(); }