@Test public void serializesNullLastSeenCorrectly() throws Exception {

  ApiDate createdAt = new ApiDate(1343826930);
  ApiDate updatedAt = new ApiDate(1347246930);
  Client client = new Client(0, "Client Name", "Client Description", null, createdAt,
      "creator-user", updatedAt, "updater-user", null, null, true, false
  );
  ClientDetailResponseV2 clientDetailResponse = ClientDetailResponseV2.fromClient(client);
  assertThat(asJson(clientDetailResponse))
      .isEqualTo(jsonFixture("fixtures/v2/clientDetailResponse_LastSeenNull.json"));
}