last time this page was processed (if any). Compare it to the list of facets created during this page
 processing pass, and remove all facets present in the old list but not the new. Save the new list as a component
 attribute so that it gets saved as part of the component's state.</li>

 <li>Release all references to the component, and pop it from the component stack for this response, removing the
 stack if this was the outermost component.</li>
 </ul>

 <p>
 The flag value to be returned is acquired by c