* String that specifies the 1-based index or name of the image to extract.
* It is translated to an image index using the same rules that
* wimlib_resolve_image() uses. However, unlike wimlib_extract_image(),
- * only a single image (not all images) can be specified.
+ * only a single image (not all images) can be specified. Alternatively,
+ * specify @p NULL here to use the first image in the WIM if it contains
+ * exactly one image but otherwise return @p WIMLIB_ERR_INVALID_IMAGE.
* @param target
* Same as the corresponding parameter to wimlib_extract_image().
* @param extract_flags