* @return a Map of plugins field with {@code Plugins#getKey()} as key
     * @see Plugin#getKey()
     */
    public Map<String, Plugin> getPluginsAsMap() {
        if (pluginMap == null) {
            synchronized (this) {
                if (pluginMap == null) {
                    pluginMap = ImmutableCollections.copy(plugins.stream().collect(
                            java.util.stream.Collectors.toMap(

 *   Added `jit_compile` as a settable property to `tf.keras.Model`.
 *   Added `synchronized` optional parameter to `layers.BatchNormalization`.
 *   Added deprecation warning to `layers.experimental.SyncBatchNormalization` and suggested to use `layers.BatchNormalization` with `synchronized=True` instead.