- static void set_head (Grob *, Direction, Grob *head);
- DECLARE_GROB_INTERFACE ();
- static Grob *head (Grob *, Direction);
- static int get_column_rank (Grob *, Direction);
- static int get_position (Grob *);
- static Direction get_default_dir (Grob *);
+ static void set_head (Spanner *, Direction, Grob *head);
+ static Item *head (Spanner *, Direction);
+ static int get_column_rank (Spanner *, Direction);
+ static int get_position (Spanner *);
+ static Direction get_default_dir (Spanner *);