+ make_spanbar_ = true;
+ }
+}
+
+void
+Span_bar_engraver::process_acknowledged ()
+{
+ if (make_spanbar_)
+ {
+ Grob *vag = Grob::get_root_vertical_alignment (bars_[0]);
+ if (vag)
+ vector_sort (bars_, Grob::vertical_less);
+ spanbar_ = make_item ("SpanBar", SCM_EOL);