public function getRSmartLoad()
    {
        if ($this->_rSmartLoad === null) {
            $smartLoadClassName = $this->smartLoadConfig['class'];
            $config = base\Helper::filterByKeys($this->smartLoadConfig, null, ['class', 'disableNativeScriptFilter']);
            $this->_rSmartLoad = new $smartLoadClassName ($this, $config);
        }
        return $this->_rSmartLoad;
    }