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r4
\override Glissando #'style = #'zigzag
\override Glissando #'color = #'green
fis'2.\glissando\< \bar "'" 
bes1~\> \bar "'" 
\tieHalfDashed bes2~ \hideNotes bes2~   \bar "'" 
\tieHalfDashed bes2~   bes2~ \unHideNotes   \bar "'" 
fis,1 \bar "'" 
r1 \bar "'" 

%\override Staff.BarLine #'color = #red
< bes a'>1  \bar "||"
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