static void add_head (Grob *me, Grob *n);
static Stem_info get_stem_info (Grob *);
static Real chord_start_y (Grob *);
static Direction get_direction (Grob *);
static void add_head (Grob *me, Grob *n);
static Stem_info get_stem_info (Grob *);
static Real chord_start_y (Grob *);
static Direction get_direction (Grob *);