given class and uses it for the http protocol upgrade
 processing.</div>
<dl class="notes">
<dt>Type Parameters:</dt>
<dd><code>T</code> - The <code>Class</code>, which extends <a href="HttpUpgradeHandler.html" title="interface in jakarta.servlet.http"><code>HttpUpgradeHandler</code></a>, of the <code>handlerClass</code>.</dd>
<dt>Parameters:</dt>
<dd><code>handlerClass</code> - The <code>HttpUpgradeHandler</code> class used for the upgrade.</dd>
<dt>Returns:</dt>
<dd>an instance of the <code>HttpUpgradeHan