{% from 'topic/_list_macro.html' import form as topic_form %}
{% from 'topic/_list_macro.html' import body as topic_body %}
{% from 'topic/_list_macro.html' import no_topics %}
<div class="panel panel-default">
  {{ topic_form() }}
  {% for topic in topics.items %}
  {{ topic_body(topic) }}
  {% else %}
  {{ no_topics() }}
  {% endfor %}
</div>