(1) Be in sup dir.
(2) Run:  python3 -m grpc_tools.protoc -I./ --python_out=. --grpc_python_out=.  ./queue_api.proto
(3) Following step is old.  Not neded now.  Stop here.
(4) In file: queue_api_pb2_grpc.py, change line 4 from: "import queue_api_pb2 as queue__api__pb2"  to "from top.sup import queue_api_pb2 as queue__api__pb2".  This change is due to python3 explicit import requirement

