okOrElseAsyncForNullable
Transforms the Nullable<T> into a Result<T, E> by mapping T to Ok(T).
If input is null, then returns Err(E) with the result of recoverer()
function okOrElseAsyncForNullable<T, E>(input: Nullable<T>, recoverer: AsyncRecoveryFn<E>): Promise<Result<T, E>>;