public static function updateGroupItem(
        $itemId,
        $priceModifier,
        $itemLabel,
        $itemQuantity
    ) {
        global $wpdb;

        $itemId = (int)$itemId;
        $priceModifier = (float)$priceModifier;
        $itemQuantity = (int)$itemQuantity;
        $itemLabel = (string)$itemLabel;

        $item = self::getGroupItemById($itemId);
        if ($item === null) {
            return Master::getErrorStore()->getErrorResponse(
                ErrorStore::GROUP_ITEM_NOT_FOUND,
                [$itemId],
                [],
                [$itemId]
            );
        }

        $csgit = Schema::getComboSetGroupItemsTable();
        $curtime = Utils::getCurrentUTCDateTimeString();
        $res = $wpdb->update(
            $csgit,
            [
                'item_label' => $itemLabel,
                'item_quantity' => $itemQuantity,
                'price_modifier' => $priceModifier,
                'updated_at' => $curtime,
            ],
            ['ID' => $itemId],
            ['%s', '%d', '%d', '%s'],
            ['%d']
        );

        if (empty($res)) {
            return Master::getErrorStore()->getErrorResponse(ErrorStore::INTERNAL_SERVER_ERROR);
        }

        return self::getGroupItemById($itemId);
    }