{# /** * @file * Default theme implementation for printed version of book outline. * * Available variables: * - title: Top level node title. * - head: Header tags. * - language: Language object. * - language_rtl: A flag indicating whether the current display language is a * right to left language. * - base_url: URL to the home page. * - contents: Nodes within the current outline rendered through * book-node-export-html.html.twig. * * @see template_preprocess_book_export_html() * * @ingroup themeable */ #}