DBCs for TupleSpace<RT,RT> and similar spaces
The issue is that in the tuple space mapper we do not have access to the range dimensions of the subspaces and so do not know that RT
has a higher range dimension although the block size is 1. So we can't provide the information which component a dof belongs to which is needed in the dirichletconstraints
class to manage DirichletBC
setups involving None
.