mapAsync method
Transforms the inner Async instance if this is an Async.
Provided for pair-axis symmetry with Result.mapOk/Result.mapErr — real code almost always wants resultMap, fold, or foldResult instead.
Implementation
@override
@visibleForTesting
@pragma('vm:prefer-inline')
Sync<T> mapAsync(@noFutures Async<T> Function(Async<T> async) noFutures) {
return this;
}