DECLARE_SCHEME_CALLBACK (calc_pure_relevant_grobs, (SCM));
DECLARE_SCHEME_CALLBACK (height, (SCM));
DECLARE_SCHEME_CALLBACK (calc_pure_height, (SCM, SCM, SCM));
+ DECLARE_SCHEME_CALLBACK (get_staves, (SCM));
+ DECLARE_SCHEME_CALLBACK (get_spaceable_staves, (SCM));
+ DECLARE_SCHEME_CALLBACK (get_nonspaceable_staves, (SCM));
System (SCM);
System (System const &);