(outside-staff-priority . 750)
(self-alignment-X . ,CENTER)
(side-axis . ,Y)
+ (spacing-pair . (break-alignment . break-alignment))
(staff-padding . 0.5)
(stencil . ,measure-counter-stencil)
+ (Y-offset . ,side-position-interface::y-aligned-side)
(meta . ((class . Spanner)
(interfaces . (font-interface
measure-counter-interface