map -package:base -is:exact -package:case-insensitive -package:unordered-containers -package:bytestring package:aeson -is:exact -is:exact

Map a function over all values in the map.
Transform the keys and values of a KeyMap.
Map values and collect the Just results.
Map values and collect the Just results.
Map a function over all values in the map.
Same as fmap. Provided for the consistency with ToJSONKeyFunction.
An abstract interface for maps from JSON keys to values.
A map from JSON key type Key to v.
Convert a HashMap to a KeyMap.
Convert a HashMap Textto a KeyMap.
Convert a Map to a KeyMap.
Convert a Map Textto a KeyMap.
Convert a KeyMap to a HashMap.
Convert a KeyMap to a HashMap Text.
Convert a KeyMap to a Map.
Convert a KeyMap to a Map Text.
Contravariant map, as ToJSONKeyFunction is a contravariant functor.