code: public void comment(char ch[], int start, int length) throws org.xml.sax.SAXException
    {
      append(m_doc.createComment(new String(ch, start, length)));
    }
docs: Report an XML comment anywhere in the document.
  
  This callback will be used for comments inside or outside the
  document element, including comments in the external DTD
  subset (if read).
  
  @param ch An array holding the characters in the comment.
  @param start The starting position in the array.
  @param length The number of characters to use from the array.