ENH: streamLine/wallBoundedStreamLine - minor refactoring to enable new derived functionality

src/functionObjects/field/wallBoundedStreamLine/wallBoundedStreamLine.H

@@ -125,6 +125,17 @@ class wallBoundedStreamLine
 {
     // Private Member Functions
 
+        //- Disallow default bitwise copy construct
+        wallBoundedStreamLine(const wallBoundedStreamLine&) = delete;
+
+        //- Disallow default bitwise assignment
+        void operator=(const wallBoundedStreamLine&) = delete;
+
+
+protected:
+
+    // Protected Member Functions
+
         //- Find wall tet on cell
         tetIndices findNearestTet
         (
@@ -133,12 +144,6 @@ class wallBoundedStreamLine
             const label celli
         ) const;
 
-        //- Disallow default bitwise copy construct
-        wallBoundedStreamLine(const wallBoundedStreamLine&) = delete;
-
-        //- Disallow default bitwise assignment
-        void operator=(const wallBoundedStreamLine&) = delete;
-
 
 public:
 
@@ -156,6 +161,15 @@ public:
             const dictionary& dict
         );
 
+        //- Construct from Time and dictionary and list of fields to sample
+        wallBoundedStreamLine
+        (
+            const word& name,
+            const Time& runTime,
+            const dictionary& dict,
+            const wordList& fieldNames
+        );
+
 
     //- Destructor
     virtual ~wallBoundedStreamLine();