DECLARE_SCHEME_CALLBACK (print, (SCM));
DECLARE_SCHEME_CALLBACK (calc_connect_to_neighbors, (SCM smob));
DECLARE_SCHEME_CALLBACK (calc_cross_staff, (SCM));
DECLARE_SCHEME_CALLBACK (print, (SCM));
DECLARE_SCHEME_CALLBACK (calc_connect_to_neighbors, (SCM smob));
DECLARE_SCHEME_CALLBACK (calc_cross_staff, (SCM));