static int line_count (Grob *);
static bool on_line (Grob *me, int pos, bool allow_ledger = true);
static Interval line_span (Grob *);
DECLARE_SCHEME_CALLBACK (print, (SCM));
DECLARE_SCHEME_CALLBACK (height, (SCM));
static int line_count (Grob *);
static bool on_line (Grob *me, int pos, bool allow_ledger = true);
static Interval line_span (Grob *);
DECLARE_SCHEME_CALLBACK (print, (SCM));
DECLARE_SCHEME_CALLBACK (height, (SCM));