map -package:containers -package:basement -package:conduit -is:exact -package:foldl -package:pipes -package:insert-ordered-containers -package:base -is:exact 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.