map -package:ghc -package:bytestring -package:basement -package:psqueues -package:regex-tdfa -package:filepath -package:charset -package:os-string -package:integration package:hedgehog 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.