flatten<T> static method
Converts a result of a result to a single result.
If the result is an error, or it is a Result
value
which is then an error, then a result with that error is returned.
Otherwise both levels of results are value results, and a single
result with the value is returned.
Implementation
static Result<T> flatten<T>(Result<Result<T>> result) {
if (result.isValue) return result.asValue!.value;
return result.asError!;
}