typedef void (*Engraver_void_function_engraver_grob_info) (Engraver *, Grob_info);
typedef void (*Translator_void_method_ptr) (Translator *);
typedef void (*Engraver_void_function_engraver_grob_info) (Engraver *, Grob_info);
typedef void (*Translator_void_method_ptr) (Translator *);