*
     * @return the maximum symbol term size
     */
    protected int getMaxSymbolTermSize() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return fessConfig.getCrawlerDocumentMaxSymbolTermSizeAsInteger();
    }

    /**
     * Checks if duplicate term removal is enabled in configuration.
     *
     * @return true if duplicate terms should be removed, false otherwise
     */

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getCrawlerDocumentMaxSymbolTermSizeAsInteger();

    /**
     * Get the value for the key 'crawler.document.duplicate.term.removed'. <br>
     * The value is, e.g. false <br>
     * comment: Whether to remove duplicate terms in documents.