ENH: class data now protected as opposed to private

src/finiteVolume/fields/fvPatchFields/derived/fixedNormalInletOutletVelocity/fixedNormalInletOutletVelocityFvPatchVectorField.H

@@ -104,7 +104,9 @@ class fixedNormalInletOutletVelocityFvPatchVectorField
 :
     public directionMixedFvPatchVectorField
 {
-    // Private data
+protected:
+
+    // Protected data
 
         //- Flux field name
         word phiName_;