if (tracker.get(o) != null) throw new JS.Exn("attempted to send multi-ref data structure via XML-RPC");
tracker.put(o, Boolean.TRUE);
sb.append(" <value><array><data>\n");
if (tracker.get(o) != null) throw new JS.Exn("attempted to send multi-ref data structure via XML-RPC");
tracker.put(o, Boolean.TRUE);
sb.append(" <value><array><data>\n");