code: public String markdownToHtml(String markdownSource, LinkRenderer linkRenderer) {
          return markdownToHtml(markdownSource.toCharArray(), linkRenderer);
      }
docs: Converts the given markdown source to HTML.
  If the input cannot be parsed within the configured parsing timeout the method returns null.
  
  @param markdownSource the markdown source to convert
  @param linkRenderer the LinkRenderer to use
  @return the HTML