purchaseFuture static method
USE WITH CARE. We're currently testing the new purchase method
All In App purchases are handled async, it's difficult to wait for something, that happens in a different thread.
This will trigger the purchase flow for the user and returns a LinkFiveActiveProducts object.
Implementation
static Future<LinkFiveActiveProducts> purchaseFuture(dynamic productDetails) {
return LinkFivePurchasesImpl().purchaseFuture(productDetails);
}