Is there a reason the go driver doesn’t support GetMappedRange, other than no-one has done it?
Yes. We haven’t implemented it yet. The feature is still considered experimental and go API is on our TODO list.
If its in the C API I’ll add it. Is there a doc outlining the process to submit a PR?
Yes. C API is here.
Sorry, we don’t have a doc yet. You should be able to create a PR now----I think @ammolitor has opened permissions.