(define (make-prop-set props)
(let ((m (make-music 'PropertySet)))
(map (lambda (x) (set! (ly:music-property m (car x)) (cdr x))) props)
(define (make-prop-set props)
(let ((m (make-music 'PropertySet)))
(map (lambda (x) (set! (ly:music-property m (car x)) (cdr x))) props)