struct Abbreviation_beam_req;
struct Abbreviation_beam_engraver;
struct Abbreviation_req;
+struct Adobe_font_metric;
+struct Adobe_font_char_metric;
+struct All_font_metrics;
struct Atom;
struct Audio_element;
struct Audio_column;
struct Audio_note_off;
struct Audio_staff;
struct Audio_tempo;
+struct Auto_beam_engraver;
struct Axis_group_element;
struct Axis_group;
struct Bar;
struct Engraver_group_engraver;
struct Extender;
struct Extender_req;
+struct G_staff_side_item;
+struct G_text_item;
struct General_script_def;
struct Graphical_element;
struct Plet;
struct Plet_engraver;
struct Plet_req;
-struct Plet_spanner;
+struct Tuplet_spanner;
struct Piano_brace;
struct Performer;
struct Performer_group_performer;
struct Super_element;
struct Translation_property;
struct Tempo_req;
+struct Tex_font_metric;
+struct Tex_font_char_metric;
struct Text_def;
struct Text_gob;
struct Text_item ;