@Deprecated(forRemoval = true)
  @SuppressWarnings("removal")
  public static @NotNull SyncDateFormat getIso8601Format() {
    var iso8601 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
    iso8601.setTimeZone(TimeZone.getTimeZone("UTC"));
    return new SyncDateFormat(iso8601);
  }
@Deprecated(forRemoval = true)
  @SuppressWarnings("removal")
  public static @NotNull SyncDateFormat getIso8601Format()