struct Clef_change_req;
struct Clef_item;
struct Clef_engraver;
+struct Clef_performer;
struct Col_hpositions;
struct Chord;
struct Colinfo;
struct Crescendo ;
struct Decresc_req;
struct Directional_spanner;
+struct Disallow_break_req;
struct Durational_req;
struct Dynamic;
struct Dynamic_req;
struct Global_translator;
struct Group_change_req;
struct Group_feature_req;
+struct Head_column;
struct Horizontal_align_item;
struct Horizontal_group;
struct Horizontal_group_item;
struct Identifier;
struct Interpreter;
struct Input_file;
-struct Input_engraver;
struct Input_score;
+struct Input_translator;
struct Item;
struct Key;
struct Key_change_req;
struct Key_item;
struct Key_engraver;
+struct Key_performer;
struct Keyword;
struct Keyword_table;
struct Lily_stream;
struct Line_of_score;
struct Line_of_staff;
+struct Line_spacer;
struct Linestaff;
struct Local_key;
struct Local_key_item;
struct Meter;
struct Meter_change_req;
struct Meter_engraver;
+struct Meter_performer;
struct Midi_def;
struct Midi_duration;
struct Midi_header;
struct My_lily_parser;
struct Note_column;
struct Note_column_engraver;
+struct Note_performer;
struct Note_req;
struct Note_head;
struct Note_head_engraver;
struct Notename_table;
struct Offset;
struct Output;
+struct Performer;
struct PCol;
struct PScore;
struct Paper_def;
struct Pulk_voices;
struct Rational;
struct Engraver_group_engraver;
+struct Performer;
+struct Performer_group_performer;
struct Request;
struct Request_column;
struct Engraver;
struct Score_column;
struct Score_elem;
struct Score_elem_info;
+struct Score_performer;
struct Script;
struct Script_column;
struct Script_def;
struct Span_dynamic_req;
struct Span_req;
struct Spanner;
+struct Spring_spacer;
+struct Staff_performer;
struct Staff_side;
struct Staff_symbol;
struct Stem;
struct Voice;
struct Voice_element;
struct Voice_group_engravers;
+struct Voice_group_performer;
struct Voice_list;
struct Voice_engravers;
struct Voicegroup;