 property.
 </p>

 <p>
 The default implementation throws <code>UnsupportedOperationException</code> and is provided for the sole purpose of
 not breaking existing applications that extend <a href="ActionSource.html" title="interface in jakarta.faces.component"><code>ActionSource</code></a>.
 Historically this method was declared in <code>ActionSource2</code> for precisely this reason but default methods in interfaces weren't supported. 
 </p></div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a hre