*   `tf.saved_model`:

    *   SavedModels can now save custom gradients. Use the option
        `tf.saved_model.SaveOption(experimental_custom_gradients=True)` to
        enable this feature. The documentation in
        [Advanced autodiff](https://www.tensorflow.org/guide/advanced_autodiff#custom_gradients)
        has been updated.

                  Valid Options: ALLOW, DENY, AUDIT, CUSTOM
                enum:
                - ALLOW
                - DENY
                - AUDIT
                - CUSTOM
                type: string
              provider:
                description: Specifies detailed configuration of the CUSTOM action.
                properties:
                  name:

                  Valid Options: ALLOW, DENY, AUDIT, CUSTOM
                enum:
                - ALLOW
                - DENY
                - AUDIT
                - CUSTOM
                type: string
              provider:
                description: Specifies detailed configuration of the CUSTOM action.
                properties:
                  name: