* to ::wimlib_progress_info.write_streams. This message may be
* received many times while the WIM file is being written or appended
* to with wimlib_write(), wimlib_overwrite(), or wimlib_write_to_fd().
* to ::wimlib_progress_info.write_streams. This message may be
* received many times while the WIM file is being written or appended
* to with wimlib_write(), wimlib_overwrite(), or wimlib_write_to_fd().