iu-8.x-1.x-dev/templates/regions/region--skirt-nav.html.twig

{% if content %}
  <div class="skirt-nav">
    {% for key, value in elements|filter((value, key) => key|first != '#') %}
      <div class="column column--{{key}}">
        {{ value }}
      </div>
    {% endfor %}
  </div>
{% endif %}