+#include "axis-group-interface.hh"
+#include "engraver.hh"
+#include "spanner.hh"
+
+class Vertical_align_engraver : public Engraver
+{
+ Spanner * valign_p_;
+ bool qualifies_b (Score_element_info) const;
+public:
+ VIRTUAL_COPY_CONS(Translator);
+ Vertical_align_engraver();
+protected:
+ virtual void acknowledge_element (Score_element_info);
+ virtual void do_creation_processing();
+ virtual void do_removal_processing();
+};