+int bus_unit_append_following(Manager *m, DBusMessageIter *i, const char *property, void *data) {
+ Unit *u = data, *f;
+ const char *d;
+
+ assert(m);
+ assert(i);
+ assert(property);
+ assert(u);
+
+ f = unit_following(u);
+ d = f ? f->meta.id : "";
+
+ if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
+ return -ENOMEM;
+
+ return 0;
+}
+