title: SimpleXml framework - embedded collections
body: <p>I try to serialize embedded collection using simple.
  For example :</p>
  
  <pre><code>Map&lt;String, List&lt;MyClass&gt;&gt;
  </code></pre>
  
  <p>I already added necessary annotations in MyClass, i tried with @ElementMap but it doesn't work:
  <code>Exception in thread "main" org.simpleframework.xml.transform.TransformException: Transform of class java.util.ArrayList not supported</code></p>
  
  <p>If its just</p>
  
  <pre><code>@ElementMap Map&lt;String, MyClass&gt;
  </code></pre>
  
  <p>it works fine. I don't know ho to deal with embedded collection. I know about <code>@ElementList</code> annotation but don't know how to use it in this case. Any hints?</p>