it->set_parent (spanbars_[i], X_AXIS);
Grob_info gi = make_grob_info (it, spanbars_[i]->self_scm ());
gi.rerouting_daddy_context_ = affected_contexts[j];
it->set_parent (spanbars_[i], X_AXIS);
Grob_info gi = make_grob_info (it, spanbars_[i]->self_scm ());
gi.rerouting_daddy_context_ = affected_contexts[j];