int device_enumerator_scan_subsystems(sd_device_enumerator *enumeartor);
int device_enumerator_add_device(sd_device_enumerator *enumerator, sd_device *device);
int device_enumerator_add_match_is_initialized(sd_device_enumerator *enumerator);
+int device_enumerator_add_match_parent_incremental(sd_device_enumerator *enumerator, sd_device *parent);
sd_device *device_enumerator_get_first(sd_device_enumerator *enumerator);
sd_device *device_enumerator_get_next(sd_device_enumerator *enumerator);
sd_device **device_enumerator_get_devices(sd_device_enumerator *enumerator, size_t *ret_n_devices);