Is there support for streaming APIs using gRPC in R?



I’m looking at updating ropensci/googleLanguageR to v0.2.0 soon - a super nice addition would be support for streaming speech-to-text for real-time translation but I have no idea how to get started.

A bit of research shows these:

The resources found already don't have an authenticated stream from an API available - are there any examples of R supporting “gRPC” streaming out there? It seems the only way to get real-time going, but it lies completely out of my experience of httr batch APIs.