TreeMultimap<@Nullable String, @Nullable Integer> multimap = createPopulate();
    assertThat(multimap.entries())
        .containsExactly(
            Maps.<@Nullable String, Integer>immutableEntry(null, 7),
            Maps.<@Nullable String, Integer>immutableEntry(null, 3),
            Maps.<@Nullable String, Integer>immutableEntry(null, 1),
            Maps.<String, @Nullable Integer>immutableEntry("tree", null),

        assertNull(DocumentUtil.getValue(doc, "key2", String.class));
    }

    public void test_strings() {
        Map<String, Object> doc = new HashMap<>();
        doc.put("key1", new String[] { "aaa", "bbb" });
        assertArrayEquals(new String[] { "aaa", "bbb" }, DocumentUtil.getValue(doc, "key1", String[].class));
        assertEquals(Arrays.asList("aaa", "bbb"), (List<String>) DocumentUtil.getValue(doc, "key1", List.class));
    }

type RootFlags struct {
	kubeconfig       *string
	configContext    *string
	impersonate      *string
	impersonateUID   *string
	impersonateGroup *[]string
	namespace        *string
	istioNamespace   *string

	defaultNamespace string
}

func AddRootFlags(flags *pflag.FlagSet) *RootFlags {
	r := &RootFlags{
		kubeconfig:       ptr.Of[string](""),
		configContext:    ptr.Of[string](""),
		impersonate:      ptr.Of[string](""),

    protected transient volatile Map<ConfigName, Map<String, String>> configParameterMap;

    protected CrawlerClientFactory crawlerClientFactory = null;

    public FileConfig() {
        setBoost(1.0f);
    }

    @Override
    public String getDocumentBoost() {
        return getBoost().toString();
    }

    @Override
    public String getIndexingTarget(final String input) {

    private static final String LOGGING_PROPERTIES = "logging.properties";

    private static final String FESS_CONTEXT_PATH = "fess.context.path";

    private static final String FESS_PORT = "fess.port";

    private static final String FESS_TEMP_PATH = "fess.temp.path";

    private static final String FESS_VAR_PATH = "fess.var.path";

    private static final String FESS_WEBAPP_PATH = "fess.webapp.path";

    }

    public List<String> getWordList(final SearchRequestType searchRequestType, final String seed, final String[] tags, final String[] roles,
            final String[] fields, final String[] excludes) {
        final String baseSeed = seed != null ? seed : fessConfig.getSuggestPopularWordSeed();
        final String[] baseTags = tags != null ? tags : fessConfig.getSuggestPopularWordTagsAsArray();

    return string || "";
  }-*/;

  @JsMethod
  static native String emptyToNull(@Nullable String string) /*-{
    return string || null;
  }-*/;

  static CommonPattern compilePattern(String pattern) {
    throw new UnsupportedOperationException();
  }

  static boolean patternCompilerIsPcreLike() {
    throw new UnsupportedOperationException();
  }

  private Platform() {}

    protected IDTYPE id;

    protected String sessionId;

    protected String ruleId;

    protected String url;

    protected String parentUrl;

    protected Integer status = Constants.OK_STATUS;

    protected Integer httpStatusCode;

    protected String method;

    protected String mimeType;

    protected Long createTime;

    protected Integer executionTime;

            return get(FessEnv.MAIL_SUBJECT_TEST_PREFIX);
        }

        public String getMailReturnPath() {
            return get(FessEnv.MAIL_RETURN_PATH);
        }

        @Override
        protected java.util.Map<String, String> prepareGeneratedDefaultMap() {
            java.util.Map<String, String> defaultMap = super.prepareGeneratedDefaultMap();

    suite.addTest(
        ListMultimapTestSuiteBuilder.using(
                new TestStringListMultimapGenerator() {
                  @Override
                  protected ListMultimap<String, String> create(Entry<String, String>[] entries) {
                    ListMultimap<String, String> multimap = ArrayListMultimap.create();
                    for (Entry<String, String> entry : entries) {