message: Constructor of an abstract base class should be protected
diff: @@ -28,10 +28,11 @@ protected:
  Array<int> Fo;
  -public:
  DofTransformation(int height, int width)
  : height_(height), width_(width) {}
  +public:
  +
  inline int Height() const { return height_; }
  inline int NumRows() const { return height_; }
  inline int Width() const { return width_; }
  