*   `tf.experimental.ExtensionType`

    *   `tf.experimental.ExtensionType` now supports Python `tuple` as the type annotation of its fields.

*   `tf.nest`

    *   Deprecated API `tf.nest.is_sequence` has now been deleted. Please use `tf.nest.is_nested` instead.

## Keras

Keras is a framework built on top of the TensorFlow. See more details on the [Keras website](https://keras.io/).

### Breaking Changes

1FAAD..1FAAF  ; valid                  ;      ; NV8    # 15.0 FOLDING HAND FAN..KHANDA
1FAB0..1FAB6  ; valid                  ;      ; NV8    # 13.0 FLY..FEATHER
1FAB7..1FABA  ; valid                  ;      ; NV8    # 14.0 LOTUS..NEST WITH EGGS
1FABB..1FABD  ; valid                  ;      ; NV8    # 15.0 HYACINTH..WING
1FABE         ; disallowed                             # NA   <reserved-1FABE>

Bigness, whereby such an Azure must be reflected before they can
constitute Clouds of other Colours. And so this being the first Colour
which Vapours begin to reflect, it ought to be the Colour of the finest
and most transparent Skies, in which Vapours are not arrived to that
Grossness requisite to reflect other Colours, as we find it is by
Experience.