* comment: Array-type fields for admin in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexAdminArrayFields();

    /**
     * Get the value for the key 'index.admin.date.fields'. <br>
     * The value is, e.g. expires,created,timestamp,last_modified <br>
     * comment: Date-type fields for admin in the index.