@Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("version: ").append(version);
    sb.append(" lastUpdateTime (sec): ").append(lastUpdateTime);
    sb.append(" lastUpdateDateTime: ").append(DATE_FORMAT.format(lastUpdateTime*1000));
    sb.append(" bytesRead: ").append(bytesRead);
    sb.append(" lastUpdateTimeReadBlobIds: ").append(lastUpdateTimeReadBlobIds);
    return sb.toString();
  }
Return {@code lastUpdateTimeReadBlobIds}
@return {@code lastUpdateTimeReadBlobIds}
ambry-cloud/src/main/java/com/github/ambry/cloud/azure/CosmosUpdateTimeFindToken.java