How to use the compact regions API to write a compact to a file?

[Matthew Pickering]

Dear devs,

I have been under the impression for a while that you can write a
compact region to a file and the functions in GHC.Compact.Serialized
also seem to suggest this is possible.

https://hackage.haskell.org/package/ghc-compact-0.1.0.0/docs/GHC-Compact-Serialized.html

It seems like there are some functions missing from the API. There is
"importCompactByteStrings"
but no function in the API which produces ByteStrings. So in order to
use this function you have to convert a SerializedCompact into a
ByteString, but in what specific way?

Has anyone got any code where they have tried to do this?

Cheers,

Matt