+ static Grob * accidentals (Grob*me);
+ static Direction dir (Grob*me);
+ static Slice head_positions_interval (Grob* me);
+ static Direction static_dir (Grob*);
+ static void translate_rests (Grob*me,int dy);
+ static Grob * first_head (Grob*me);
+ static void set_stem (Grob*me,Grob*);
+ static void set_dotcol (Grob*me,Grob*);
+ static void add_head (Grob*me,Grob*);
+ static bool rest_b (Grob*me);
+ static bool has_interface (Grob*);