Define unName as a function rather than a field selector.

src/Data/Abstract/Environment.hs

@@ -85,7 +85,7 @@ mergeNewer (Environment a) (Environment b) =
 -- | Extract an association list of bindings from an 'Environment'.
 --
 -- >>> pairs shadowed
--- [(Name {unName = "foo"},Address {unAddress = Precise 1)]
+-- [(Name "foo",Address {unAddress = Precise 1)]
 pairs :: Environment location value -> [(Name, Address location value)]
 pairs = map (second Address) . Map.toList . fold . unEnvironment
 

src/Data/Abstract/FreeVariables.hs

@@ -8,12 +8,15 @@ import           Data.Term
 import           Prologue
 
 -- | The type of variable names.
-newtype Name = Name { unName :: ByteString }
+newtype Name = Name ByteString
   deriving (Eq, Ord, Show)
 
 name :: ByteString -> Name
 name = Name
 
+unName :: Name -> ByteString
+unName (Name bytes) = bytes
+
 instance IsString Name where
   fromString = Name . BC.pack