@Test
public void toJsonReturnsExpected() {

    final JsonObject thingJson = THING.toJson(FieldType.notHidden());
    final SudoRetrieveThingResponse underTest = SudoRetrieveThingResponse.of(thingJson, EMPTY_DITTO_HEADERS);
    final JsonObject actualJson = underTest.toJson(FieldType.notHidden());
    assertThat(actualJson).isEqualTo(KNOWN_JSON);
}