@VisibleForTesting
  public static Date parseIso8601DateTime(String zonedIso8601DateTime) throws ParseException {
    return Date.from(
        DateTimeFormatter.ISO_OFFSET_DATE_TIME.parse(zonedIso8601DateTime, Instant::from));
  }
Nearly identical variant of {@link Instant#parse} that, per RFC3339, is okay with either
offsets or "Z" indicator.
extensions/data-transfer/portability-data-transfer-google/src/main/java/org/datatransferproject/datatransfer/google/mediaModels/GoogleMediaItem.java