Hi!

As far as I know, your assumption is correct. However, Janusgraph-GRPC is still in the early stages of development and I guess it will still take a few versions before it will become available. That's also the reason, why the feature is still undocumented. If you have any specific questsions, I would recommend to reach out to Jan Jansen (@farodin91 on GitHub) because he drives the development behind Janusgraph-GRPC.

Best regards,
Florian