+ return brew_molecule_p()->extent ().y ();
+}
+
+void
+Text_spanner::do_substitute_dependency (Score_elem* o, Score_elem*n)
+{
+ if (support_span_l_ == o)
+ support_span_l_ = (Directional_spanner*) (n?n->spanner():0);
+}
+
+
+Text_spanner::~Text_spanner()
+{
+ delete spec_p_;