(note-head ,ly:grob? "A single note head.")
(note-heads ,ly:grob-array? "A list of note head grobs.")
+ (padding-pairs ,list? "An alist mapping @code{(@var{name} . @var{name})}
+to distances.")
(pedal-text ,ly:grob? "A pointer to the text of a mixed-style piano
pedal.")
(pure-Y-common ,ly:grob? "A cache of the