n a non-null value. Otherwise, the container must check the user for
 membership in the application role.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>role</code> - a <code>String</code> specifying the name of the role</dd>
<dt>Returns:</dt>
<dd>a <code>boolean</code> indicating whether the user making this request belongs to a given role;
 <code>false</code> if the user has not been authenticated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getUserPrincipal()">
<h3>getUserPrincip