}

    private void addTOC(Document document) {
        Element tocSection = document.body().select("section.topic").first().before("<section class='table-of-contents'/>").previousElementSibling();
        tocSection.append("<h2>Table Of Contents</h2>");
        Element toc = tocSection.append("<ul class='toc'/>").children().last();

        Elements h23elements = document.select("h2,h3");