ult
 implementation returns <code>null</code>.</span></div>
<div class="block"><p>
 Convenience method, which must be called by <code>restoreView()</code>, to construct and return a <a href="../../../jakarta/faces/component/UIViewRoot.html" title="class in jakarta.faces.component"><code>UIViewRoot</code></a>
 instance (populated with children and facets) representing the tree structure of the component tree being restored.
 If no saved state information is available, return <code>null</code> instead.
 </p><