ly:paper-get-number
ly:paper-system?
ly:output-def-lookup
- ly:parse-string
ly:parser-parse-string
ly:pitch-alteration
ly:pitch-diff
ly:stencil-combine-at-edge
ly:stencil-expr
ly:stencil-extent
- ly:stencil-moved-to-edge
ly:stencil-translate
ly:stencil-translate-axis
ly:stencil?