(and (ly:skyline-empty? (ly:skyline-pair::skyline skyp UP))
(ly:skyline-empty? (ly:skyline-pair::skyline skyp DOWN))))
-; checks if the pair is not null, and then if not empty
+;; checks if the pair is not null, and then if not empty
(define-public (skyline-pair-and-non-empty? skyp)
(and (ly:skyline-pair? skyp)
(not (skyline-pair::empty? skyp))))