(visibility-lambda . ,end-of-line-visible)
(style . vaticana)
(Y-offset-callbacks . (,Staff_symbol_referencer::callback))
+ (font-family . music)
(meta . ,(grob-description custos-interface staff-symbol-referencer-interface break-aligned-interface) )
))
(X-offset-callbacks . (,Stem::off_callback))
(X-extent-callback . ,Stem::dim_callback)
(Y-extent-callback . ,Stem::height)
+ (font-family . music)
(meta . ,(grob-description stem-interface font-interface))
))