Grails conditional html

I was wondering how I can make this code in my view conditional - output it if there is a comment, but if there isn't a comment, don't output the empty 开发者_运维百科<p class="comment"></p>

<p class="comment">
  ${progressItem.comment}
</p>

---

<g:if test="${(progressItem?.comment?.size() > 0)}">
  <p class="comment">
    ${progressItem.comment}
  </p>
</g:if>