* comment: Field name for creation date in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexFieldCreated();

    /**
     * Get the value for the key 'index.field.timestamp'. <br>
     * The value is, e.g. timestamp <br>
     * comment: Field name for timestamp in the index.