code: public XMLString xstr(XPathContext xctxt)
            throws javax.xml.transform.TransformerException
    {
      return execute(xctxt).xstr();
    }
docs: Cast result object to a string.
  
  
  @param xctxt The XPath runtime context.
  @return The string this wraps or the empty string if null
  
  @throws javax.xml.transform.TransformerException