-MAKE_SCHEME_CALLBACK (Span_bar,brew_molecule,1);
-
-/**
- * Limitations/Bugs:
- *
- * (1) Elements from 'me->get_grob_property ("elements")' must be
- * ordered according to their y coordinates relative to their common
- * axis group parent. Otherwise, the computation goes mad. (TODO:
- * apply a sort algorithm that ensures this precondition.) However,
- * until now, I have seen no case where lily has not fulfilled this
- * precondition.
- *
- * (2) This method depends on bar_engraver not being removed from
- * staff context. If bar_engraver is removed, the size of the staff
- * lines is evaluated as 0, which results in a solid span bar line
- * with faulty y coordinate.
- */