title: iterate through list in StringTemplate
body: <p>I have a map in Java</p>
  
  <pre><code>Map&lt;String, Object&gt; model = new HashMap&lt;&gt;();
  </code></pre>
  
  <p>Each (key,value) pair of this map is a list of urls:</p>
  
  <pre><code>List&lt;String&gt; thumbnailImgUrl = new ArrayList&lt;&gt;();
  for (....) {
      thumbnailUrl.add(url);
  }
  model.put("photoUrl", thumbnailImgUrl);
  </code></pre>
  
  <p>I am passing the object "model" to the StringTemplate.</p>
  
  <p>How can I access individual urls in string template?</p>
  
  <pre><code>Notification(model) ::= &lt;&lt;
    {how can I access the individual urls here?}
  &gt;&gt;
  </code></pre>