+static int method_list_units(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ return list_units_filtered(bus, message, userdata, error, NULL);
+}
+
+static int method_list_units_filtered(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_strv_free_ char **states = NULL;
+ int r;
+
+ r = sd_bus_message_read_strv(message, &states);
+ if (r < 0)
+ return r;
+
+ return list_units_filtered(bus, message, userdata, error, states);
+}
+