public function checkDeleteProducts(&$objFormParam, $arrProductClassIds, $delete_product_class_id, $arrDeleteKeys)
    {
        foreach ($arrProductClassIds as $relation_index => $product_class_id) {
            //product_class_idの重複はないので、１つ削除したら完了
            if ($product_class_id == $delete_product_class_id) {
                foreach ($arrDeleteKeys as $delete_key) {
                    $arrProducts = $objFormParam->getValue($delete_key);
                    foreach ($arrProducts as $index => $product_info) {
                        if ($index != $relation_index) {
                            $arrUpdateParams[$delete_key][] = $product_info;
                        }
                    }
                    $objFormParam->setParam($arrUpdateParams);
                }
                break;
            }
        }
    }