/**
     * Get the value for the key 'index.dictionary.prefix'. <br>
     * The value is, e.g.  <br>
     * comment: Prefix for dictionary index names.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexDictionaryPrefix();

    /**
     * Get the value for the key 'index.dictionary.prefix' as {@link Integer}. <br>

        `TruncatedNormal` initializers have been changed to match those in
        external Keras.
    *   Breaking change: `model.get_config()` on a Sequential model now returns
        a config dictionary (consistent with other Model instances) instead of a
        list of configs for the underlying layers.

## Bug Fixes and Other Changes

*   C++: