tion of <a href="../../../javax/faces/event/ActionListener.html" title="interface in javax.faces.event"><code>ActionListener</code></a>
 and store it in the internal data structure that backs the <a href="../../../javax/faces/component/ActionSource.html#getActionListeners--"><code>ActionSource.getActionListeners()</code></a> method, taking care to over-write any
 instance that was stored by a previous call to
 <code>setActionListener</code>.</p>

 <p>Any method referenced by such an expression must be publi