map -package:containers -package:charset is:exact -package:insert-ordered-containers -package:dlist -package:Cabal-syntax -package:basement -package:conduit -package:invertible -package:integration -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.