void acknowledge_arpeggio (Grob_info);
void acknowledge_rhythmic_head (Grob_info);
void acknowledge_finger (Grob_info);
void acknowledge_arpeggio (Grob_info);
void acknowledge_rhythmic_head (Grob_info);
void acknowledge_finger (Grob_info);
ADD_ACKNOWLEDGER (Accidental_engraver, finger);
ADD_ACKNOWLEDGER (Accidental_engraver, rhythmic_head);
ADD_ACKNOWLEDGER (Accidental_engraver, tie);
ADD_ACKNOWLEDGER (Accidental_engraver, finger);
ADD_ACKNOWLEDGER (Accidental_engraver, rhythmic_head);
ADD_ACKNOWLEDGER (Accidental_engraver, tie);