Stencil stencil;
// join heads
- Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-heads"));
+ Link_array<Grob> heads (extract_grob_array (me, ly_symbol2scm ("note-heads")));
if (to_boolean (me->get_property ("join-heads"))
&& heads.size() > 1)
{