DECLARE_SCHEME_CALLBACK (calc_control_points, (SCM));
DECLARE_SCHEME_CALLBACK (print, (SCM));
DECLARE_SCHEME_CALLBACK (calc_connect_to_neighbors, (SCM smob));
+ DECLARE_SCHEME_CALLBACK (calc_cross_staff, (SCM));
DECLARE_GROB_INTERFACE();
static Grob* get_common_x (Spanner *);