d
 returns <code>null</code>.

 <p>
 To make sure the session is properly maintained, you must call this method before the response is committed. If the
 container is using cookies to maintain session integrity and is asked to create a new session when the response is
 committed, an IllegalStateException is thrown.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>create</code> - <code>true</code> to create a new session for this request if necessary; <code>false</code> to return
 <c