+ DECLARE_SCHEME_CALLBACK (y_offset_callback, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_cross_staff, (SCM));
+ DECLARE_GROB_INTERFACE ();
+ static string glyph_name (Grob *, int durlog, const string &style, bool, Real);
+ static Real staff_position_internal (Grob *, int /* duration_log */,
+ int /* dir */);
+ static SCM brew_internal_stencil (Grob *, bool);
+ static SCM generic_extent_callback (Grob *, Axis);
+ static void translate (Grob *me, int dy);
+ DECLARE_SCHEME_CALLBACK (polyphonic_offset_callback, (SCM));
+ DECLARE_SCHEME_CALLBACK (print, (SCM));
+ DECLARE_SCHEME_CALLBACK (width, (SCM));
+ DECLARE_SCHEME_CALLBACK (height, (SCM));
+ DECLARE_SCHEME_CALLBACK (pure_height, (SCM, SCM, SCM));