mkdocs-material/material/nav.html

<div class="md-sidebar md-sidebar--primary md-js__sidebar">
  <div class="md-sidebar__scrollwrap">
    <nav class="md-sidebar__inner md-nav">
      <h3 class="md-nav__title">Navigation</h3>
      <ul class="md-nav__list">
        {% for nav_item in nav %}
          {% set path = "md-toggle-nav-" + loop.index | string %}
          {% include "nav-item.html" %}
        {% endfor %}
      </ul>
    </nav>
  </div>
</div>