pcatL' :: Bool -> [LyMusic] -> LyMusic
pcatL' p = foldr Lilypond.simultaneous (Lilypond.Simultaneous p [])
pcatL' :: Bool -> [LyMusic] -> LyMusic
pcatL' p = foldr Lilypond.simultaneous (Lilypond.Simultaneous p [])
pcatL' p = foldr Lilypond.simultaneous (Lilypond.Simultaneous p [])