map -package:containers -package:case-insensitive -package:basement -is:exact -package:foldl -package:ghc -is:exact -package:bytestring package:hedgehog -is:exact is:exact
Generates a map using a
Range to determine the length.
This may fail to generate anything if the keys produced by the
generator do not account for a large enough number of unique
items to satify the required map size.