public static String nullToEmpty(@Nullable String string) {
    return Platform.nullToEmpty(string);
  }

  /**
   * Returns the given string if it is nonempty; {@code null} otherwise.
   *
   * @param string the string to test and possibly return
   * @return {@code string} itself if it is nonempty; {@code null} if it is empty or null
   */
  public static @Nullable String emptyToNull(@Nullable String string) {

  public static String nullToEmpty(@Nullable String string) {
    return Platform.nullToEmpty(string);
  }

  /**
   * Returns the given string if it is nonempty; {@code null} otherwise.
   *
   * @param string the string to test and possibly return
   * @return {@code string} itself if it is nonempty; {@code null} if it is empty or null
   */
  public static @Nullable String emptyToNull(@Nullable String string) {

    String[] strings = NUMBER_NAMES.toArray(new String[0]);
    ImmutableSortedSet<String> set = ImmutableSortedSet.copyOf(strings);
    sort(strings);
    for (int i = 0; i < strings.length; i++) {
      assertThat(set.tailSet(strings[i], true))
          .containsExactlyElementsIn(sortedNumberNames(i, strings.length))
          .inOrder();
    }
  }

  public void testTailSetExclusive() {

    Map<String, Integer> map = ImmutableMap.of("a", 4, "b", 9);
    Map<String, Double> transformed = transformValues(map, SQRT_FUNCTION);

    assertEquals(ImmutableMap.of("a", 2.0, "b", 3.0), transformed);
  }

  public void testTransformEntries() {
    Map<String, String> map = ImmutableMap.of("a", "4", "b", "9");
    EntryTransformer<String, String, String> concat =
        new EntryTransformer<String, String, String>() {

    public void test_render_plainText() {
        String result = markdownRenderer.render("Hello World");
        assertTrue(result.contains("Hello World"));
        assertTrue(result.contains("<p>"));
    }

    @Test
    public void test_render_bold() {
        String result = markdownRenderer.render("**bold text**");
        assertTrue(result.contains("<strong>bold text</strong>"));
    }

    @Test

    }

    @Test
    public void test_getCacheKey_emptyArrays() {
        String seed = "test_seed";
        String[] tags = new String[0];
        String[] roles = new String[0];
        String[] fields = new String[0];
        String[] excludes = new String[0];

        String result = popularWordHelper.getCacheKey(seed, tags, roles, fields, excludes);

        assertNotNull(result);

     */
    default void putResultDataWithTemplate(final Map<String, Object> dataMap, final String key, final Object value, final String template,
            final String scriptType) {
        Object target = value;
        if (template != null) {
            final Map<String, Object> contextMap = new HashMap<>();
            contextMap.put("doc", dataMap);
            final Map<String, Object> paramMap = new HashMap<>(dataMap.size() + 2);

    @Size(max = 10)
    public String searchFileProxy;

    /** Enable or disable using browser locale for search. */
    @Size(max = 10)
    public String searchUseBrowserLocale;

    /** SSO type (none, oic, saml, spnego, entraid). */
    @Size(max = 100)
    public String ssoType;

    /** User agent string for crawling operations. */
    @Size(max = 1000)
    public String crawlingUserAgent;

    }

    @Override
    public String toString() {
      return sourceFormat + ".converterTo(" + targetFormat + ")";
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0L;
  }

  abstract String normalizeWord(String word);

  String normalizeFirstWord(String word) {
    return normalizeWord(word);
  }

    public void test_parseSearchWords_withPartialReadings() throws Exception {
        String[] words = new String[] { "word1", "word2", "word3" };
        // Only provide readings for first word
        String[][] readings = new String[][] { new String[] { "reading1" } };
        String[] fields = new String[] { "content" };

        SuggestItem item =