- css() }}
  {{ _webpack.head_js_preload() }}
{%- endblock css %}
{%- block extrahead %}
  <meta name="viewport" content="width=device-width, initial-scale=1"/>
  <meta name="docsearch:language" content="{{ language }}"/>
  {%- if last_updated %}
    <meta name="docbuild:last-update" content="{{ last_updated | e }}"/>
  {%- endif %}
{%- endblock extrahead %}
{% block body_tag %}
  {# set up with scrollspy to update the toc as we scroll #}
  {# ref: https://getbootstrap.com/docs/4.0/components/scrollspy/ #}
