+public:
+ DECLARE_SCHEME_CALLBACK (y_offset_callback, (SCM));
+ static bool has_interface (Grob *);
+ static string glyph_name (Grob *, int, string, bool);
+ static SCM brew_internal_stencil (Grob*, bool);
+ static SCM generic_extent_callback (Grob*, Axis);
+ DECLARE_SCHEME_CALLBACK (polyphonic_offset_callback, (SCM));
+ DECLARE_SCHEME_CALLBACK (print, (SCM));
+ DECLARE_SCHEME_CALLBACK (width, (SCM));
+ DECLARE_SCHEME_CALLBACK (height, (SCM));