map -package:containers is:exact -package:bytestring -package:base-compat-batteries -package:blaze-html -package:integration -package:case-insensitive -package:filepath -package:invertible -package:dlist -package:Cabal-syntax package:aeson

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