title: richfaces how to avoid displaying rich tree icon?
body: <p>richfaces how to avoid displaying rich tree icon ? 
  I want to filter the tree where if one father is filltered he won't be showen but his children will so i need to change from defult icon to none icon .</p>
  
  <pre><code>&lt;rich:treeNode type="regularNode"
                  icon="#{item.toShow?item.icon:'null'}" rendered="#{item.toShow}"&gt;
  </code></pre>
  
  <p>where the item represent a treeNode</p>