change.
-   You make the change and submit it for the review again.
-   This cycle repeats itself until the PR gets approved.
-   Note: As a friendly reminder, we may reach out to you if the PR is awaiting
    your response for more than 2 weeks.

**4. Approved**

-   Once the PR is approved, it gets `kokoro:force-run` label applied and it
    initiates CI/CD tests.

    *   `tf.contrib.data.choose_from_datasets()` is now available via the public
        API.
    *   Adding `drop_remainder` argument to `tf.data.Dataset.batch()` and
        `tf.data.Dataset.padded_batch()`, deprecating
        `tf.contrib.data.batch_and_drop_remainder()` and
        `tf.contrib.data.padded_batch_and_drop_remainder()`.
*   `tf.estimator`:
    *   `Estimator`s now use custom savers included in `EstimatorSpec` scaffolds