filter -package:Cabal -package:unordered-containers -package:base package:bytestring is:exact

O(n) filter, applied to a predicate and a ByteString, returns a ByteString containing those characters that satisfy the predicate.
O(n) filter, applied to a predicate and a ByteString, returns a ByteString containing those characters that satisfy the predicate.
O(n) filter, applied to a predicate and a ByteString, returns a ByteString containing those characters that satisfy the predicate.