Experimental::GridFunctionSpace does not have a 'size' method

The old GridFunctionSpaces have this method. Witness this by applying the following short patch to testdunefunctionsgfs.cc:

@@ -89,6 +89,10 @@ void solvePoissonProblem()
   typedef PDELab::Experimental::GridFunctionSpace<Basis,VectorType,Constraints> GridFunctionSpace;
   GridFunctionSpace gfs(basis,con);

+  // Test the 'size' method
+  if (order==1 and gfs.size() != gridView.size(dim))
+    DUNE_THROW(Exception, "gfs.size() does not return the correct number!");
+
   // Container for the Dirichlet boundary conditions
   typedef typename GridFunctionSpace::template ConstraintsContainer<double>::Type C;
   C constraintsContainer;

This issue is of low priority for me, because I can always call basis.size() instead of gfs.size(). However, it may become a problem in more complicated situations than mine.