map -package:containers -is:exact -package:foldl -package:charset -package:invertible -package:conduit -package:basement -is:exact -package:filepath -package:ghc -package:imports is:exact package:hedgehog
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.