-ADD_ACKNOWLEDGER (Rhythmic_column_engraver, stem);
-ADD_ACKNOWLEDGER (Rhythmic_column_engraver, flag);
-ADD_ACKNOWLEDGER (Rhythmic_column_engraver, rhythmic_head);
+
+void
+Rhythmic_column_engraver::boot ()
+{
+ ADD_ACKNOWLEDGER (Rhythmic_column_engraver, stem);
+ ADD_ACKNOWLEDGER (Rhythmic_column_engraver, flag);
+ ADD_ACKNOWLEDGER (Rhythmic_column_engraver, rhythmic_head);
+}