DiscountCouponTable::isValidCouponType

static function isValidCouponType($couponType)
{
	$couponType = (int)$couponType;
	return (
		$couponType == self::TYPE_BASKET_ROW
		|| $couponType == self::TYPE_ONE_ORDER
		|| $couponType == self::TYPE_MULTI_ORDER
	);
}