code: def create_stub(generated_create_stub, channel=None, service_path=None,
                  service_port=None, credentials=None, scopes=None,
                  ssl_credentials=None):
      
      if channel is None:
          target = '{}:{}'.format(service_path, service_port)
  
          if credentials is None:
              credentials = _grpc_google_auth.get_default_credentials(scopes)
  
          channel = _grpc_google_auth.secure_authorized_channel(
              credentials, target, ssl_credentials=ssl_credentials)
  
      return generated_create_stub(channel)
docs: Creates a gRPC client stub.
  
      Args:
          generated_create_stub (Callable): The generated gRPC method to create a
              stub.
          channel (grpc.Channel): A Channel object through which to make calls.
              If None, a secure channel is constructed. If specified, all
              remaining arguments are ignored.
          service_path (str): The domain name of the API remote host.
          service_port (int): The port on which to connect to the remote host.
          credentials (google.auth.credentials.Credentials): The authorization
              credentials to attach to requests. These credentials identify your
              application to the service.
          scopes (Sequence[str]): The OAuth scopes for this service. This
              parameter is ignored if a credentials is specified.
          ssl_credentials (grpc.ChannelCredentials): gRPC channel credentials
              used to create a secure gRPC channel. If not specified, SSL
              credentials will be created using default certificates.
  
      Returns:
          grpc.Client: A gRPC client stub.