apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/config/BizConfig.java/BizConfig/releaseMessageScanIntervalInMilli
class BizConfig:  public int releaseMessageScanIntervalInMilli() {
    int interval = getIntProperty("apollo.message-scan.interval", DEFAULT_RELEASE_MESSAGE_SCAN_INTERVAL_IN_MS);
    return checkInt(interval, 100, Integer.MAX_VALUE, DEFAULT_RELEASE_MESSAGE_SCAN_INTERVAL_IN_MS);
  }