\set Score.repeatCommands = #(list (list 'volta voltaAdLib) 'start-repeat)
c4 b d e
\set Score.repeatCommands = #'((volta #f) (volta "4.") end-repeat)
\set Score.repeatCommands = #(list (list 'volta voltaAdLib) 'start-repeat)
c4 b d e
\set Score.repeatCommands = #'((volta #f) (volta "4.") end-repeat)