code: private void DTDprolog() throws SAXException, IOException {
          final java.io.Writer writer = m_writer;
          if (m_needToOutputDocTypeDecl)
          {
              outputDocTypeDecl(m_elemContext.m_elementName, false);
              m_needToOutputDocTypeDecl = false;
          }
          if (m_inDoctype)
          {
              writer.write(" [");
              writer.write(m_lineSep, 0, m_lineSepLen);
              m_inDoctype = false;
          }
      }
docs: A private helper method to output the
  @throws SAXException
  @throws IOException