map -package:containers -package:Cabal-syntax -package:base-prelude -package:bytestring -package:case-insensitive -package:integration -package:base is:exact -package:aeson -package:monoidal-containers -package:base-compat-batteries -package:insert-ordered-containers package:basement
Map all element a from a block to a new block of b
Map all elements in a list