(if (string=? glyph "markup.moderntab")
;; if it is "moderntab", we'll draw it
(let* ((staff-symbol (ly:grob-object grob 'staff-symbol))
(if (string=? glyph "markup.moderntab")
;; if it is "moderntab", we'll draw it
(let* ((staff-symbol (ly:grob-object grob 'staff-symbol))