How is gRPC used at Google? I know the Cloud APIs use gRPC, but only on the client side. But I'm under the impression that gRPC and Stubby (the internal RPC fr

How is gRPC used at Google? I know the Cloud APIs use gRPC, but only on the client side. But I'm under the impression that gRPC and Stubby (the internal RPC framework?) are completely different codebases (even if they are allegedly similar).