ssEvent(jakarta.faces.event.ComponentSystemEvent)"><code>ComponentSystemEventListener.processEvent(jakarta.faces.event.ComponentSystemEvent)</code></a>, the listener implementation may assume that the
 <code>source</code> of this event instance is the <a href="../component/UIViewRoot.html" title="class in jakarta.faces.component"><code>UIViewRoot</code></a> instance that is about to be rendered.
 </p>

 <div class="changed_added_2_0">

 <p>
 It is valid for a listener for this event to change the <a href=".