public function isDispatchable(Request $request)
    {
        $className = $this->getControllerClass($request);
        if (($this->_defaultModule != $this->_curModule)
        || $this->getParam('prefixDefaultModule'))
        {
            $className = $this->formatClassName($this->_curModule, $className);
        }
        if (class_exists($className)) {
            return true;
        }
        return false;
    }