union a NEMap / NESet with Map / Set?

[aryairani]

I know it opens a can of worms in terms of naming, but I missed a union version of NEMap.insertMap which still gets the O(m*log(n/m + 1)), m <= n complexity.

I'm using something like:

unionMap1 :: Ord a => Map a b -> NEMap a b -> NEMap a b
unionMap1 m n = NEMap.withNonEmpty n (<> n) m

unionMap2 :: Ord a => NEMap a b -> Map a b -> NEMap a b
unionMap2 n m = NEMap.withNonEmpty n (n <>) m

I'm happy to open a PR if you like these, but could use some help choosing names.

[mstksg]

Thanks for the idea, I like it :) maybe unionMapLeft and unionMapRight?