map -package:containers -package:base -package:conduit -package:incipit-base -package:bytestring -package:filepath -package:invertible -package:basement -package:integration package:hedgehog -is:exact 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.