build method

Implementation

RequestPurchaseProps build() {
  final iosProps = ios.sku.isNotEmpty ? ios.build() : null;
  final androidProps = android.skus.isNotEmpty ? android.build() : null;

  return RequestPurchaseProps.subs((
    ios: iosProps,
    android: androidProps,
    useAlternativeBilling: useAlternativeBilling,
  ));
}