isAlternativeBillingOnlyAvailable method
Returns if the caller can use alternative billing only without giving the user a choice to use Play billing.
Implementation
Future<BillingResultWrapper> isAlternativeBillingOnlyAvailable() async {
final BillingResultWrapper wrapper =
await _billingClientManager.runWithClient((BillingClient client) =>
client.isAlternativeBillingOnlyAvailable());
return wrapper;
}