map is:exact -package:lens -package:bytestring -package:Cabal-syntax -package:base-compat -package:base-prelude -package:dense-linear-algebra -package:base-compat-batteries -package:aeson -package:imports -package:amazonka-core -package:hedgehog package:basement
Map all element a from a block to a new block of b
Map all elements in a list