public function prepareComboSet($args) {
        if (empty($args['sku']) || empty($args['post_id'])) {
            return;
        }
        $sku = wel_get_sku($args['post_id'], $args['sku']['code']);
        if (empty($sku)) {
            return;
        }
        $offset = 0;
        if (defined('WCEX_DLSELLER')) {
            $offset = 1;
        }
        $csi = $offset + USCES_COL_SKU_APPLICABLE_TAXRATE + count(self::getHeaders());
        $comboset = !empty($args['datas'][$csi]) ? (string)$args['datas'][$csi] : '[]';
        $comboset = json_decode($comboset, true);
        if (empty($comboset)) {
            return;
        }

        $comboset['skuMetaId'] = $sku['meta_id'];
        $this->combosets[] = $comboset;
    }