configure abstract method
Initializes the in-app purchase system.
Retrieves product details and sets up purchase handling.
productIds
Set of product identifiers to fetch details for.onDetailsFetched
Callback when products are fetched.
Implementation
/// * [productIds] Set of product identifiers to fetch details for.
/// * [onDetailsFetched] Callback when products are fetched.
void configure({
required Set<String> productIds,
required Function(List<PurchaseDetails>?) onDetailsFetched,
});