{#- The tab's pages, pydata's `sidebar-nav-bs.html` with one change (WP-2021): the heading
    names the tab.  pydata writes "Section Navigation" over every tab, which the `<nav>`'s
    label already tells a screen reader and the column tells everyone else.  On a tab's own
    front page `parents` is empty, and the page is the tab. -#}
{% set show_nav_level = meta['html_theme.show_nav_level'] if (meta is defined and meta is not none and 'html_theme.show_nav_level' in meta) else theme_show_nav_level %}
<nav class="bd-docs-nav bd-links"
     aria-label="{{ _('Section Navigation') }}">
  <p class="bd-links__title" role="heading" aria-level="1">{{ parents[0].title if parents else title }}</p>
  <div class="bd-toc-item navbar-nav">
    {{- generate_toctree_html(
      "sidebar",
      show_nav_level=show_nav_level | int,
      maxdepth=theme_navigation_depth | int,
      collapse=theme_collapse_navigation | tobool,
      includehidden=theme_sidebar_includehidden | tobool,
      titles_only=True
      )
    -}}
  </div>
</nav>