map is:exact -package:bytestring -package:containers -package:ghc -package:foldl -package:basement -package:invertible -package:pipes -package:base -package:monoidal-containers -package:integration 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.