map -package:containers -package:base-compat -package:dlist -package:charset -package:case-insensitive is:exact -package:incipit-base -package:ghc -package:bytestring -package:filepath -package:invertible package:aeson

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