public static Payment AddPayment(this UserPaymentData paymentData, PayRequest request, BillingPrice price, DateTime now, OfferPaymentInfo offer = null, SubscriptionPaymentInfo subscription = null) => default;
public static Payment AndPayment(this UserPaymentData paymentData, string billingTxId, string clientTxId, BillingPrice price, string originalCurrency, double?originalAmount, int?netEasePaymentTypeId, DateTime now, OfferPaymentInfo info = null, SubscriptionPaymentInfo subscriptionInfo = null, GooglePointsPaymentInfo googlePointsInfo = null, BattlePassPaymentInfo battlePassInfo = null, bool isTestPayment = false) => default;