map is:exact -package:base-prelude -package:containers -package:charset -package:base-compat-batteries -package:aeson -package:case-insensitive -package:invertible 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.