PN_IS_REF         468 core/objmodel.c   if (PN_IS_REF(data)) return data;
PN_IS_REF         699 core/vm.c              if (PN_IS_REF(locals[op.b])) {
PN_IS_REF         707 core/vm.c              if (PN_IS_REF(locals[op.b])) {