sub.closeSubscription(topic, subid);
sendXExpectLastY(pub, sub, topic, subid, 50, 20);
// update bound to 10
sub.subscribe(topic, subid, options10);
sub.closeSubscription(topic, subid);
sendXExpectLastY(pub, sub, topic, subid, 50, 10);
// message bound is not provided, no update
sub.subscribe(topic, subid, CreateOrAttach.CREATE_OR_ATTACH);
sub.closeSubscription(topic, subid);