(,cheap-list? . "list")
(,fraction? . "fraction, as pair")
(,grob-list? . "list of grobs")
+ (,index? . "non-negative integer")
;; this is built on cheap-list
(,list-or-symbol? . "list or symbol")
(,markup? . "markup")
(,ly:translator? . "translator")
(,ly:translator-group? . "translator group")
(,ly:unpure-pure-container? . "unpure/pure container")
- (,ly:vsize? . "vsize")
))