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

    /**
     * Get the value for the key 'suggest.update.contents.limit.num.percentage'. <br>
     * The value is, e.g. 50% <br>
     * comment: Percentage limit for suggestion update contents.