struct Engraver_group_engraver;
struct General_script_def;
struct Graphical_element;
+
struct Graphical_axis_group;
struct Mark_req;
struct Music_output;
struct Performer;
struct Performer_group_performer;
struct Property_iterator;
-struct Ps_lookup;
-struct Ps_outputter;
-struct Ps_stream;
struct Request;
struct Request_column;
struct Engraver;
struct Super_element;
struct Translation_property;
struct Tempo_req;
-struct Tex_lookup;
-struct Tex_outputter;
-struct Tex_stream;
struct Text_def;
struct Text_gob;
struct Text_item ;