@Override
  public String toString() {
    return "StaleNamedBlob[accountId=" + accountId + ",containerId=" + containerId + ",blobName=" + blobName
        + ",blobId=" + blobId + ",version=" + version + ",deleteTs=" + deleteTs + "]";
  }
@return the delete timestamp from the stale record.
ambry-api/src/main/java/com/github/ambry/named/StaleNamedBlob.java