ntext identifier to be assigned to the
 PolicyContext for the calling thread. The value <code>null
 </code> is a legitimate value for this parameter.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/SecurityException.html?is-external=true" title="class or interface in java.lang">SecurityException</a></code> - if the calling AccessControlContext is not authorized by the container
 to call this method.</dd>
</dl>
</li>
</ul>
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