SCM avoid_slur = me->get_property ("avoid-slur");
if (slur && to_boolean (slur->get_property ("cross-staff"))
&& (avoid_slur == ly_symbol2scm ("outside")
SCM avoid_slur = me->get_property ("avoid-slur");
if (slur && to_boolean (slur->get_property ("cross-staff"))
&& (avoid_slur == ly_symbol2scm ("outside")