s/lifecycle/ClientWindow.html" title="class in jakarta.faces.lifecycle"><code>ClientWindow</code></a> for an overview of the feature.

 If <a href="../../../jakarta/faces/context/ExternalContext.html#getClientWindow--"><code>ExternalContext.getClientWindow()</code></a> returns null, create a new instance of
 <code>ClientWindow</code> using the <a href="../../../jakarta/faces/lifecycle/ClientWindowFactory.html" title="class in jakarta.faces.lifecycle"><code>ClientWindowFactory</code></a>. If the result is no