protected function getOrderStatusesList()
    {
        $result = array();

        // Because many users won't know how to deselect a single option in a
        // multiple select element, an empty option is added.
        $result['0'] = $this->t('option_empty_triggerOrderStatus');
        $result += $this->shopCapabilities->getShopOrderStatuses();

        return $result;
    }