public function addWishlistButton($skubutton) {
        global $usces;

        $display = Master::getFilterableValues();
        $currentsku = urlencode($usces->itemsku['code']);
        $post_id = (int)get_the_ID();
        ob_start();
        ?>
        <div class="wcexwl item-page-buttons flex row-wrap ai-stretch jc-flex-end ml-05rem-children-not-first mt-05rem-children">
            <?php echo $skubutton; ?>
            <div class="wcexwl flex row-wrap ai-stretch">
                <input
                    type="submit"
                    value="<?php echo $display['addToWishlistButtonText'] ?>"
                    class="wishlist-button <?php echo $display['btnsecondary']; ?>"
                    onclick="return wcexwl.item.addToWishlist(event, this, <?php echo $post_id; ?>, '<?php echo $currentsku; ?>')"
                />
            </div>
        </div>
        <?php
        $buttons = (string)ob_get_clean();
        /**
         * Filters item page SKU and wishlist button HTML
         *
         * @important
         * @param string $buttons
         * @param string $skubutton Welcart 'Add to Cart' SKU button
         * @param int    $post_id
         * @param string $currentsku
         */
        $buttons = apply_filters('wcexwl_filter_item_page_buttons_html', $buttons, $skubutton, $post_id, $currentsku);

        return $buttons;
    }