* The value is, e.g. org.codelibs.fess.app.job.ScriptExecutorJob <br>
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getSchedulerJobClass();

    /**
     * Get the value for the key 'scheduler.concurrent.exec.mode'. <br>
     * The value is, e.g. QUIT <br>