- virtual void prepare (Moment mom);
- virtual void finish ();
- virtual void one_time_step ();
+ DECLARE_LISTENER (finish);
+ DECLARE_LISTENER (prepare);
+ DECLARE_LISTENER (one_time_step);
+
+ /* Engraver_group_engraver interface */
+ virtual void connect_to_context (Context *);
+ virtual void disconnect_from_context ();