struct Cadenza_req;
struct Change_iterator;
struct Change_translator;
-struct Chord;
+struct Simultaneous_music;
struct Clef_change_req;
struct Clef_item;
struct Clef_engraver;
struct Clef_performer;
struct Column_x_positions;
-struct Chord;
struct Column_info;
struct Collision;
struct Collision_engraver;
struct Multi_measure_rest;
struct Multi_measure_rest_req;
struct Multi_measure_rest_engraver;
-struct Music_general_chord;
struct Musical_script_req;
-struct Music_voice;
+struct Music_list;
struct Musical_req;
struct Music;
-struct Music_list;
+struct Music_sequence;
struct My_lily_parser;
struct Note_column;
struct Note_column_engraver;
struct Vertical_align_spanner;
struct Vertical_align_engraver;
struct Align_element;
-struct Voice;
+struct Sequential_music;
struct Request_chord;
-struct Voice_group_performer;
-struct Voice_list;
+
typedef Rational Moment;
#endif // LILY_PROTO_HH