code: private void writeComma() throws IOException
     {
        if (m_firstNameValuePair.peek().booleanValue())
        {
           m_firstNameValuePair.pop();
           m_firstNameValuePair.push(Boolean.FALSE);
        }
        else
        {
           m_writer.write(',');
        }
     }
docs: Write a comma to the output stream if required.