+void
+Dynamic_align_engraver::acknowledge_footnote_spanner (Grob_info info)
+{
+ Grob *parent = info.grob ()->get_parent (Y_AXIS);
+ if (line_ && parent
+ && parent->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
+ Axis_group_interface::add_element (line_, info.grob ());
+}
+