map is:exact -package:blaze-html -package:containers -package:Cabal-syntax -package:base-prelude -package:foldl -package:base -package:bytestring -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.