(text . ,(grob::calc-property-by-copy 'text))
(X-offset . ,(grob::calc-property-by-copy 'X-offset))
(Y-offset . ,(grob::calc-property-by-copy 'Y-offset))
- (Y-extent . ,grob::always-Y-extent-from-stencil)
(meta . ((class . Item)
(interfaces . (balloon-interface
font-interface