map -package:containers -package:charset -package:integration -package:dlist -package:bytestring -package:insert-ordered-containers -package:os-string -package:invertible -package:base-compat -package:Cabal-syntax package:aeson is:exact

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