(length-fraction ,number? "Length of ledger line as fraction of note head size.")
(lengths ,list? "Default stem lengths. The list gives a length
for each flag-count.")
+ (line-break-system-details ,list?
+ "Alist of properties to use when this
+column is the start of a system.")
+
(line-count ,integer? "The number of staff lines.")
(measure-length ,ly:moment? "Length of a
measure. Used in some spacing situations.")