public function getInvalidViews()
    {
        $aInvalidViews = [];
        $aShopViews = $this->_getShopViews();

        foreach ($aShopViews as $sView) {
            if (!$this->_isViewValid($sView)) {
                $aInvalidViews[] = $sView;
            }
        }

        return $aInvalidViews;
    }