map -package:Cabal -package:base -package:case-insensitive -package:bytestring -package:blaze-html -package:unordered-containers -package:containers is:exact -package:ghc 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.