diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,3 +7,7 @@
 ## 0.1.0.1 -- 2020-10-05
 
 * First version revised A. Fixed issue with the wrong import statements order.
+
+## 0.1.1.0 -- 2020-10-05
+
+* First version revised B. Added a new class definition.
diff --git a/Data/Lists/FLines.hs b/Data/Lists/FLines.hs
--- a/Data/Lists/FLines.hs
+++ b/Data/Lists/FLines.hs
@@ -71,3 +71,7 @@
    | compare n 1 == LT = Nothing
    | otherwise = getNT (n - 1) g (FL xss)
   getNT _ _ _ = Nothing
+
+class GetTransL a b where
+  getTL :: (b -> b) -> a -> b
+
diff --git a/lists-flines.cabal b/lists-flines.cabal
--- a/lists-flines.cabal
+++ b/lists-flines.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                lists-flines
-version:             0.1.0.1
+version:             0.1.1.0
 synopsis:            Additional data and structures to some 'String'-related lists.
 description:         Is primarily used to transform some Strings read from a file.
 homepage:            https://hackage.haskell.org/package/lists-flines