with exactly one <code>UIViewRoot</code>
 instance at a time, but may display many different <code>UIViewRoot</code>s during its lifetime.
 </p>

 <p>
 The <code>ClientWindow</code> instance is associated with the incoming request during the
 <a href="../../../jakarta/faces/lifecycle/Lifecycle.html#attachWindow-jakarta.faces.context.FacesContext-"><code>Lifecycle.attachWindow(jakarta.faces.context.FacesContext)</code></a> method. This method will cause a new instance of <code>ClientWindow</code> to be
 crea