protected function createSliderArrow()
    {

        $skin = self::$arrowSkins[$this->arrowSkinId];
//$this->data['arrow']['top'] = 0;
// $this->data['arrow']['top'] = floor($this->data['slideHeight'] / 2);
        $this->data['arrow']['left'] = $skin['left'];
        $this->data['arrow']['right'] = $skin['right'];
        $skin['s']['$Class'] = '$JssorArrowNavigator$';
        $this->mergeSkinSettings($skin, '$ArrowNavigatorOptions');
    }