Best way to collapse Option<Option<T>> to Option<T>

[usr-ein]

Hello!

I was happily using this lib (great lib!), and I ran into a case where I ran a function that looks like this:

const addNullStartPadding = <T>(
    arr: T[][],
    extraRows: number,
    extraCols: number,
): Option<T>[][] =>

On a matrix that already contained Options, (e.g. const a = [[Some(1), None, Some(2)], [...], [...]]).

This thus returned me an Option<Option<number>>[][], and I want to "collapse" it to Option<number>[][] by merging the two options.

I found that I could do:

const result: Option<Option<number>>[][] = ...;
return result.map((row) => row.map((value) => value.andThen((v) => v)))

which is an effective way to do so, but I was expecting a more practical way to do this. Perhaps value.collapse(), or something.

What other, simpler way would there be to collapse like that?