code: public void error(String msg, Object[] args) throws javax.xml.transform.TransformerException
    {
  
      java.lang.String fmsg = org.apache.xalan.res.XSLMessages.createXPATHMessage(msg, args);
      
  
      throw new javax.xml.transform.TransformerException(fmsg);
    }
docs: Tell the user of an error, and probably throw an
  exception.
  
  @param msg An error msgkey that corresponds to one of the constants found
  in {@link org.apache.xpath.res.XPATHErrorResources}, which is
  a key for a format string.
  @param args An array of arguments represented in the format string, which
  may be null.
  
  @throws TransformerException if the current ErrorListoner determines to
  throw an exception.