@Override
  public DateTime unmarshal(String v) throws Exception {
    return DateTime.parse(v, FORMATTER);
  }
@Test
  public void unmarshal() throws Exception {
    XmlDateTimeAdapter adapter = new XmlDateTimeAdapter();
    String dateTimeInput = "2022-12-29T21:04:51.171Z";
    assertEquals(
        Instant.ofEpochMilli(1672347891171L).toDateTime(), adapter.unmarshal(dateTimeInput));
  }