map -package:containers -package:charset -package:invertible -package:monoidal-containers -package:bytestring -is:exact -package:filepath -package:foldl -package:dlist is:exact -package:case-insensitive package:aeson

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