// unregister via ECF discovery
discoveryAdvertiser.unregisterService(serviceInfo);
// check SRV record is gone
final ZoneTransferIn xfr = ZoneTransferIn.newAXFR(new Name(DnsSdTestHelper.REG_DOMAIN), DnsSdTestHelper.DNS_SERVER, null);
final List records = xfr.run();
for (final Iterator itr = records.iterator(); itr.hasNext();) {
final Record record = (Record) itr.next();
if(record instanceof SRVRecord) {
if(comparator.compare(serviceInfo, record) >= 0) {
fail("Service not removed/unregisterd");