class Protobuf::Rpc::Service

will timeout since no data will be sent.
the implementing service method, otherwise the connection
NOTE: If @async_responder is set to true, this MUST be called by

Tell the server to generate response and send it to the client.

def send_response
  error_message = "Unable to send response, responder is nil. It appears you aren't inside of an RPC request/response cycle."
  log_and_raise_error(error_message) if @responder.nil?
  @responder.call(@response)
end