Compatibility fixes

src/amdis/ProblemStat.hpp

@@ -243,13 +243,13 @@ namespace AMDiS
       createFileWriter();
     }
 
-/*
+
     /// Return the gridView of the leaf-level
     auto leafGridView() { return grid->leafGridView(); }
 
     /// Return the gridView of levle `level`
     auto levelGridView(int level) { return grid->levelGridView(level); }
-*/
+
     /// Return the \ref feSpaces
     std::shared_ptr<GlobalBasis> const& getGlobalBasis() { return globalBasis; }