@Test
public void toJsonReturnsExpected() {

    final DeletePolicyResponse underTest =
            DeletePolicyResponse.of(TestConstants.Policy.POLICY_ID, TestConstants.EMPTY_DITTO_HEADERS);
    final JsonObject actualJsonCreated = underTest.toJson(FieldType.regularOrSpecial());
    assertThat(actualJsonCreated).isEqualTo(KNOWN_JSON);
}