nt</code></a>
 argument</span>, the implementation of this class must take the
 argument <code>methodExpressionOneArg</code>, extract its
 expression string, and create another
 <code>MethodExpression</code> whose expected param types match
 those of a zero argument method.  The usage requirements for both
 of these <code>MethodExpression</code> instances are described in
 <a href="../../../javax/faces/event/MethodExpressionActionListener.html#processAction-javax.faces.event.ActionEvent-"><code>processActio