(Y-offset . ,ly:hara-kiri-group-spanner::force-hara-kiri-callback)
(Y-extent . ,ly:hara-kiri-group-spanner::y-extent)
(X-extent . ,ly:axis-group-interface::width)
(vertical-skylines . ,ly:hara-kiri-group-spanner::calc-skylines)
(max-stretch . ,ly:axis-group-interface::calc-max-stretch)
(stencil . ,ly:axis-group-interface::print)
(Y-offset . ,ly:hara-kiri-group-spanner::force-hara-kiri-callback)
(Y-extent . ,ly:hara-kiri-group-spanner::y-extent)
(X-extent . ,ly:axis-group-interface::width)
(vertical-skylines . ,ly:hara-kiri-group-spanner::calc-skylines)
(max-stretch . ,ly:axis-group-interface::calc-max-stretch)
(stencil . ,ly:axis-group-interface::print)