def success(message, **kwargs):
    kwargs["fg"] = kwargs.get("fg", "green")
    click.secho(message, **kwargs)
def list_instances(
        self,
    ) -> Callable[[appengine.ListInstancesRequest], appengine.ListInstancesResponse]:
        r"""Return a callable for the list instances method over gRPC.

        Lists the instances of a version.

        Tip: To aggregate details about instances over time, see the
        `Stackdriver Monitoring
        API <https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list>`__.

        Returns:
            Callable[[~.ListInstancesRequest],
                    ~.ListInstancesResponse]:
                A function that, when called, will call the underlying RPC
                on the server.
        """
        # Generate a "stub function" on-the-fly which will actually make
        # the request.
        # gRPC handles serialization and deserialization, so we just need
        # to pass in the functions for each.
        if "list_instances" not in self._stubs:
            self._stubs["list_instances"] = self.grpc_channel.unary_unary(
                "/google.appengine.v1.Instances/ListInstances",
                request_serializer=appengine.ListInstancesRequest.serialize,
                response_deserializer=appengine.ListInstancesResponse.deserialize,
            )
        return self._stubs["list_instances"]