(side-support-elements ,ly:grob-array? "The side support, an array of
grobs.")
- (skyline-quantizing ,ly:vsize? "The number of boxes to break a
+ (skyline-quantizing ,index? "The number of boxes to break a
slur into when calculating its skyline.")
(slur ,ly:grob? "A pointer to a @code{Slur} object.")
(spacing ,ly:grob? "The spacing spanner governing this section.")