message: getnumghostelements in ncmesh
diff: @@ -331,6 +331,7 @@ public:
  /// Return the number of root elements.
  int GetNumRootElements() { return root_state.Size(); }
  + virtual int GetNumGhostElements() const { return 0; }
  /// Return the distance of leaf 'i' from the root.
  int GetElementDepth(int i) const;
  