sketch up a finset/map lib #10
Description
Could be based on beyond.v + subset operation (e.g. see https://hackage.haskell.org/package/containers-0.6.6/docs/src/Data.Set.Internal.html#isSubsetOfX)
{{ message }}
Could be based on beyond.v + subset operation (e.g. see https://hackage.haskell.org/package/containers-0.6.6/docs/src/Data.Set.Internal.html#isSubsetOfX)