r <a href="../../../javax/faces/event/ComponentSystemEventListener.html#processEvent-javax.faces.event.ComponentSystemEvent-"><code>ComponentSystemEventListener.processEvent(javax.faces.event.ComponentSystemEvent)</code></a>, the listener
 implementation may assume that the <code>source</code> of this event
 instance is the <a href="../../../javax/faces/component/UIComponent.html" title="class in javax.faces.component"><code>UIComponent</code></a> instance that is about to be
 rendered and that it is safe t