ontainer. When this method activates a handler,
 it passes to the handler the context
 object key and the handler data associated with the calling thread.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - a <code>String</code> that identifies the
 <code>PolicyContextHandler</code> to activate and the context object
 to be acquired from the handler. The value of this parameter must
 not be null.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the container and