static SCM forced_shift (Grob *);
static Drul_array<Link_array<Grob> > get_clash_groups (Grob *me);
- DECLARE_SCHEME_CALLBACK (force_shift_callback, (SCM element, SCM axis));
DECLARE_SCHEME_CALLBACK (calc_positioning_done, (SCM smob));
static void add_column (Grob *me, Grob *ncol);
static bool has_interface (Grob *);