### What I observed Use `HTTP2` to establish and maintain the connection. Use `GPRC` to transmit HEADERS and PAYLOAD (using protobuf).  ### Is it multiplexed I can see that there is `Stream ID` on the `HTTP2` protocol, so I guess that `GPRC` uses `HTTP2` multiplexing. 
What I observed
Use
HTTP2to establish and maintain the connection.Use
GPRCto transmit HEADERS and PAYLOAD (using protobuf).Is it multiplexed
I can see that there is
Stream IDon theHTTP2protocol, so I guess thatGPRCusesHTTP2multiplexing.