optimizer.
    *   **Learning rate schedule access.** When using a `LearningRateSchedule`,
        The new optimizer's `learning_rate` property returns the
        current learning rate value instead of a `LearningRateSchedule` object
        as before. If you need to access the `LearningRateSchedule` object,
        please use `optimizer._learning_rate`.

                        - name
                        type: object
                      type: array
                    randomSamplingPercentage:
                      description: Controls the rate at which traffic will be selected
                        for tracing if no prior sampling decision has been made.
                      format: double
                      maximum: 100

- Add `rest_client_rate_limiter_duration_seconds` metric to component-base to track client side rate limiter latency in seconds. Broken down by verb and URL. ([#88134](https://github.com/kubernetes/kubernetes/pull/88134), [@jennybuckley](https://github.com/jennybuckley)) [SIG API Machinery, Cluster Lifecycle and...

                        - name
                        type: object
                      type: array
                    randomSamplingPercentage:
                      description: Controls the rate at which traffic will be selected
                        for tracing if no prior sampling decision has been made.
                      maximum: 100
                      minimum: 0