map -package:containers -package:base -package:foldl -package:bytestring -package:monoidal-containers -package:base-compat -package:integration -package:base-prelude -package:imports -package:incipit-base -package:hedgehog -package:blaze-html package:basement is:exact
Map all element a from a block to a new block of b
Map all elements in a list