title: How to create a gwt composite component with children using uibinder?
body: <p>I would like to create a component to decorate its children, such as:</p>
  
  <p>mycomponent.ui.xml:</p>
  
  <pre><code>&lt;g:FlowPanel addStyleNames="myStyle"&gt;
      &lt;!-- how can i render children ? --&gt;
  &lt;/g:FlowPanel&gt;
  </code></pre>
  
  <p>and then others can use:</p>
  
  <pre><code>&lt;myapp:mycomponent&gt;
      &lt;g:Label&gt;Decorated child&lt;/g:Label&gt;
  &lt;/myapp:mycomponent&gt;
  </code></pre>
  
  <p>How can i render the children in uibinder? (or in Java, if i must)</p>