apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/config/BizConfig.java/BizConfig/releaseMessageNotificationBatchIntervalInMilli
class BizConfig:  public int releaseMessageNotificationBatchIntervalInMilli() {
    int interval = getIntProperty("apollo.release-message.notification.batch.interval", DEFAULT_RELEASE_MESSAGE_NOTIFICATION_BATCH_INTERVAL_IN_MILLI);
    return checkInt(interval, 10, Integer.MAX_VALUE, DEFAULT_RELEASE_MESSAGE_NOTIFICATION_BATCH_INTERVAL_IN_MILLI);
  }