code: public NodeIterator nodeset() throws javax.xml.transform.TransformerException
    {
  
      error(XPATHErrorResources.ER_CANT_CONVERT_TO_NODELIST,
            new Object[]{ getTypeString() });  //"Can not convert "+getTypeString()+" to a NodeList!");
  
      return null;
    }
docs: Cast result object to a nodelist. Always issues an error.
  
  @return null
  
  @throws javax.xml.transform.TransformerException