`(
(X-offset ,number? "The horizontal amount that this object is moved relative to its X-parent")
(Y-offset ,number? "The vertical amount that this object is moved
-relative to its X-parent")
+relative to its Y-parent")
(accidentals ,list? "List of alteration numbers")
(after-line-breaking ,boolean? "Dummy property, used to trigger callback for after-line-breaking")
(alteration-alist ,list? "List of @code{(@var{pitch}