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

    /**
     * Get the value for the key 'scheduler.job.class'. <br>
     * The value is, e.g. org.codelibs.fess.app.job.ScriptExecutorJob <br>
     * comment: Job class for the scheduler.