map -package:containers is:exact -package:foldl -package:charset -package:base-compat -package:base -package:filepath -package:invertible -package:Cabal-syntax -package:monoidal-containers -package:integration package:aeson

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