(predicate ,procedure? "the predicate of a \\outputproperty.")
(quoted-events ,vector? "A vector of with moment/event-list entries.")
(quoted-music-name ,string? "The name of the voice to quote.")
+ (quoted-voice-direction ,ly:dir? "Should the quoted voice be up-stem or down-stem?")
+ (quoted-context-type ,symbol? "The name of the context to direct quotes to, eg., @code{Voice}.")
+ (quoted-context-id ,string? "The id of the context to direct quotes to, eg., @code{cue}.")
+
(type ,symbol? "The type of this music object. Determines iteration in some cases.")
(types ,list? "The types of this music
object; determines by what engraver this music expression is