public function lookupProxy($lookupName)
    {

        // load the initial context instance
        $initialContext = $this->getInitialContext();

        // query whether a request context is available
        if ($servletRequest = RequestHandler::getRequestContext()) {
            // inject the servlet request to handle SFSBs correctly
            $initialContext->injectServletRequest($servletRequest);
        }

        // return the proxy instance
        return $initialContext->lookup($lookupName);
    }