TreeWalker tw = new TreeWalker(this);
TreeWalker tw = new TreeWalker(this, support.getDOMHelper());
  public void outputResultTreeFragment(XObject obj, XPathContext support)          throws org.xml.sax.SAXException  {    DocumentFragment docFrag = obj.rtree(support);    TreeWalker tw = new TreeWalker(this);    Node n;    for (n = docFrag.getFirstChild(); null != n; n = n.getNextSibling())    {      flushPending(EVT_NODE);  // I think.      tw.traverse(n);    }  }