swing = \mark \markup {
  \line \general-align #Y #DOWN {
    \score {
      \new Staff \with {
        fontSize = #-2
        \override StaffSymbol.line-count = #0
%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
      }
      \relative {
        \stemUp
        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
        \override Beam.positions = #'(2 . 2)
        h'8[ h8]
      }
      \layout {
        ragged-right= ##t
        indent = 0
        \context {
          \Staff \remove "Clef_engraver"
          \remove "Time_signature_engraver"
        }
      }
    }
    " ="
    \score {
      \new Staff \with {
        fontSize = #-2
        \override StaffSymbol.line-count = #0
%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
      }
      \relative {
        \stemUp
        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
        \override Stem.length = #4.5
        \tuplet 3/2 { h'4 h8 }
      }
      \layout {
        ragged-right= ##t
        indent = 0
        \context {
          \Staff
          \remove "Clef_engraver"
          \remove "Time_signature_engraver"
        }
      }
    }
  }
}