code: @Override
      public String convert(String content) {
          StringWriter writer = new StringWriter();
          HtmlDocumentBuilder builder = new HtmlDocumentBuilder(writer);
          builder.setEmitAsDocument(false);
          parser.setBuilder(builder);
  
          parser.parse(content);
          parser.setBuilder(null);
          return writer.toString();
      }
docs: /* (non-Javadoc)
  @see org.opoo.press.Converter#convert(java.lang.String)