fromOption<L, R> function
Create a TaskEither from an Option. If it is None, then the
TaskEither will resolve to a Left containing the result from executing
onNone
.
Implementation
TaskEither<L, R> Function(Option<R> option) fromOption<L, R>(
L Function() onNone,
) =>
either.fromOption<L, R>(onNone).compose(fromEither);