DfsReferral start = dr;
            SmbException se = null;

            do {
                try {
                    if (log.level >= 2)
                        log.println("DFS redirect: " + dr);

                    UniAddress addr = UniAddress.getByName(dr.server);
                    SmbTransport trans = SmbTransport.getSmbTransport(addr, url.getPort());

   * users with "read-only" access to internal bimaps. Query operations on the returned bimap "read
   * through" to the specified bimap, and attempts to modify the returned map, whether direct or via
   * its collection views, result in an {@code UnsupportedOperationException}.
   *
   * <p>The returned bimap will be serializable if the specified bimap is serializable.
   *