private static String insertAddendum(String description, HtmlChunk addendum) {
    String addendumString = addendum.toString();
    if (!description.contains("<!-- tooltip end -->")) {
      addendumString = "<!-- tooltip end -->" + addendumString;
    }
    Matcher matcher = ADDENDUM_PLACE.matcher(description);
    if (matcher.find()) {
      return description.substring(0, matcher.start()) + addendumString + description.substring(matcher.start());
    }
    return description + addendumString;
  }
private static String insertAddendum(String description, HtmlChunk addendum)