map -package:containers -package:charset -package:invertible -package:monoidal-containers -is:exact -package:base-compat is:exact -package:dense-linear-algebra -package:basement -package:dlist -package:regex-tdfa package:aeson

map :: (a -> b) -> KeyMap a -> KeyMap b
aeson Data.Aeson.KeyMap
Map a function over all values in the map.