sendXExpectLastY(pub, sub, topic, subidUnbounded, 10000, 10000);
sub.unsubscribe(topic, subidUnbounded);
sendXExpectLastY(pub, sub, topic, subid20, 1000, 20);
sub.unsubscribe(topic, subid20);
sendXExpectLastY(pub, sub, topic, subid5, 1000, 5);
sub.unsubscribe(topic, subid5);
client.close();