return this;
    }

    @Override
    public Model getSuperModel(String version) {
        if (superModel == null) {
            String resource = "/org/apache/maven/model/pom-" + version + ".xml";

            InputStream is = getClass().getResourceAsStream(resource);

            if (is == null) {
                throw new IllegalStateException("The super POM " + resource + " was not found"

     * @param stringFormatter
     */
    public void setStringFormatter(InputLocation.StringFormatter stringFormatter) {
        delegate.setStringFormatter(
                stringFormatter != null ? location -> stringFormatter.toString(new InputLocation(location)) : null);
    } // -- void setStringFormatter( InputLocation.StringFormatter )

    /**
     * Method write.
     *
     * @param writer a writer object.
     * @param model a model object.

                                "title": "Description",
                                "anyOf": [{"type": "string"}, {"type": "null"}],
                            },
                            "tax": {
                                "title": "Tax",
                                "anyOf": [{"type": "number"}, {"type": "null"}],
                            },
                        },
                    },

        ObjectNode doNodeValue = (ObjectNode) doNodeParent.get(getKeyToFind());
        ArrayNode arrayWarnings = (ArrayNode) doNodeValue.get("warnings");
        if (arrayWarnings == null) {
            return;
        }

        List<String> keepWarnings = new ArrayList<>();
        arrayWarnings.elements().forEachRemaining(warning -> {
            String warningValue = warning.textValue();

            @Throws(IOException::class)
            override fun authenticate(route: Route?, response: Response): Request? {
              if (response.request.header("Authorization") != null) {
                return null // Give up, we've already attempted to authenticate.
              }

              println("Authenticating for response: $response")
              println("Challenges: ${response.challenges()}")

            if (accessResultData != null) {
                accessResult.setAccessResultData(null);
                try {
                    final Transformer transformer = ComponentUtil.getComponent(accessResultData.getTransformerName());
                    if (transformer == null) {
                        // no transformer

        transformer.init();

        final Node pruneNode = transformer.pruneNode(document.cloneNode(true), null);
        assertEquals(getXmlString(document), getXmlString(pruneNode));
        ComponentUtil.setFessConfig(null);
    }

    @Test
    public void test_pruneNode_removeNoScript() throws Exception {

 */
class MailingListTest {

    @Test
    void testHashCodeNullSafe() {
        new MailingList().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new MailingList().equals(null));

        new MailingList().equals(new MailingList());
    }

    @Test
    void testEqualsIdentity() {
        MailingList thing = new MailingList();

      @Override
      protected @Nullable C computeNext(C previous) {
        return equalsOrThrow(previous, first) ? null : domain.previous(previous);
      }
    };
  }

  private static boolean equalsOrThrow(Comparable<?> left, @Nullable Comparable<?> right) {
    return right != null && Range.compareOrThrow(left, right) == 0;
  }

  @Override
  boolean isPartialView() {
    return false;
  }

    }

    @After
    public void tearDown() throws Exception {
        LocaleUtil.setDefault(null);
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToDate_Null() throws Exception {
        assertThat(toDate(null), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test