`GuanoFile.write()` currently writes the `fmt_`, `data`, and `guan` chunks to an output file, but any other chunks are excluded. We should (optionally?) persist all original chunks in the saved file.
GuanoFile.write()currently writes thefmt_,data, andguanchunks to an output file, but any other chunks are excluded.We should (optionally?) persist all original chunks in the saved file.