OptionallogsGalactic log block, null when the file has none. Absent for UVProbe and
PerkinElmer files.
File-level metadata: the Galactic header, the UVProbe metadata, or the PerkinElmer metadata.
The spectra of the file, in file order.
Non-fatal anomalies (truncation, clamped log, inconsistent header, ...). Always present.
What
parsereturns.