4 \consists "Timing_engraver";
5 \consists "Bar_column_engraver";
6 \consists "Bar_number_engraver";
7 \consists "Span_score_bar_engraver";
8 \consists "Score_priority_engraver";
9 \consists "Priority_horizontal_align_engraver";
10 \consists "Vertical_align_engraver";
13 \accepts "Staff_group";
15 \accepts "Rhythmic_staff";
17 \accepts "Grand_staff";