/** * Applies to specified Bf_Subscription: a coupon by a specified code. * @param string The Coupon code to apply. * @param union[string $id | Bf_Subscription $subscription] The Bf_Subscription to which the Bf_Coupon should be applied. <string>: ID of the Bf_Subscription. <Bf_Subscription>: The Bf_Subscription. * @return Bf_Coupon The applied coupon. */ public static function applyCouponCodeToSubscription($couponCode, $subscription) { return Bf_AddCouponCodeRequest::applyCouponCodeToSubscription($couponCode, $subscription); }