//contains remoteAddress and principal
SerializableCollection collectionWrapper;
try {
collectionWrapper = (SerializableCollection) sendAndReceive(auth, connection);
} catch (Exception e) {
throw new RetryableIOException(e);
}
final Iterator<Data> iter = collectionWrapper.iterator();
if (iter.hasNext()) {
final Data addressData = iter.next();
final Address address = ss.toObject(addressData);