/** * NON-DOM extension: * Create and return a TreeWalker. * * @param root The root of the iterator. * @param whatToShow The whatToShow mask. * @param filter The NodeFilter installed. Null means no filter. */ public TreeWalker createTreeWalker(Node root, short whatToShow, NodeFilter filter) { return createTreeWalker(root, whatToShow, filter, true); } /**