docs/themes/mynewt/sidebar.html

<!-- STARTS .container-sidebar -->
<div class="container-sidebar col-xs-12 col-sm-3">
  <div id="docSidebar" class="sticky-container">
    {% include "searchbox.html" %}
    {% include "versions.html" %}
    <div class="region region-sidebar">
      <div class="docs-menu">
      {% block menu %}
        {% set toctree = toctree(maxdepth=-1, collapse=True, titles_only=False, includehidden=True) %}
        {% if toctree %}
            {{ toctree }}
        {% else %}
          <!-- Local TOC -->
          <div class="local-toc">{{ toc }}</div>
        {% endif %}
      {% endblock %}
      </div>
    </div>
  </div>
  <!-- ENDS STICKY CONTAINER -->
</div>
<!-- ENDS .container-sidebar -->