static void add_unordered_grob (Grob *, SCM nm, Grob *);
static void set_ordered (Grob *, SCM, bool);
static Grob_array *get_grob_array (Grob*, SCM);
static void add_unordered_grob (Grob *, SCM nm, Grob *);
static void set_ordered (Grob *, SCM, bool);
static Grob_array *get_grob_array (Grob*, SCM);