p>

 <ul>

 <li>Retrieve from the <a href="../../../../../jakarta/faces/component/UIComponent.html" title="class in jakarta.faces.component"><code>UIComponent</code></a> the set of component ids of child components created by
 <a href="../../../../../jakarta/faces/webapp/UIComponentTag.html" title="class in jakarta.faces.webapp"><code>UIComponentTag</code></a> instances the last time this page was processed (if any). Compare it to the list of children
 created during this page processing pass, and remove al