code: def make_insecure_stub(stub_class, host, port=None):
      
      if port is None:
          target = host
      else:
          # NOTE: This assumes port != http_client.HTTPS_PORT:
          target = "%s:%d" % (host, port)
      channel = grpc.insecure_channel(target)
      return stub_class(channel)
docs: Makes an insecure stub for an RPC service.
  
      Uses / depends on gRPC.
  
      :type stub_class: type
      :param stub_class: A gRPC stub type for a given service.
  
      :type host: str
      :param host: The host for the service. May also include the port
                   if ``port`` is unspecified.
  
      :type port: int
      :param port: (Optional) The port for the service.
  
      :rtype: object, instance of ``stub_class``
      :returns: The stub object used to make gRPC requests to a given API.