void show_all_routes ();
void hide_all_routes ();
void show_all_audiotracks ();
void hide_all_audiotracks ();
void show_all_audiobus ();
void hide_all_audiobus ();
void show_all_routes ();
void hide_all_routes ();
void show_all_audiotracks ();
void hide_all_audiotracks ();
void show_all_audiobus ();
void hide_all_audiobus ();