preamble

.sectionbody=content
- if (attr? :toc) && (attr? 'toc-placement', 'preamble')
  #toc class=(attr 'toc-class', 'toc')
    #toctitle=(attr 'toc-title')
    =Asciidoctor::HTML5::DocumentTemplate.outline(@document, (attr :toclevels, 2).to_i)