pan class="paramLabel">Parameters:</span></dt>
<dd><code>req</code> - the <code>HttpServletRequest</code> object that is sent to the servlet</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>long</code> integer specifying the time the <code>HttpServletRequest</code> object was last modified,
 in milliseconds since midnight, January 1, 1970 GMT, or -1 if the time is not known</dd>
</dl>
</li>
</ul>
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