*   `tf.random`:
    * Added `tf.random.experimental.index_shuffle`, for shuffling a sequence without materializing the sequence in memory.

*   `tf.RaggedTensor`:
    *   Introduced `tf.experimental.RowPartition`, which encodes how one dimension in a RaggedTensor relates to another, into the public API.
    *   Introduced `tf.experimental.DynamicRaggedShape`, which represents the shape of a RaggedTensor.

## Security