Google
constructor(underlyingSK2Transaction: Purchase? = null, transactionDate: Date?, originalTransactionIdentifier: String?, state: StoreTransactionState, storeTransactionId: String?, originalTransactionDate: Date?, webOrderLineItemID: String?, appBundleId: String?, subscriptionGroupId: String?, isUpgraded: Boolean?, expirationDate: Date?, offerId: String?, revocationDate: Date?, appAccountToken: String?, purchaseToken: String, payment: StorePayment, signature: String?)(source)