* be created automatically.
     *
     * @param output The file to serialize the settings to, must not be {@code null}.
     * @param options The options to use for serialization, may be {@code null} to use the default values.
     * @param settings The settings to serialize, must not be {@code null}.
     * @throws IOException If the settings could not be serialized.
     */

    public String toString() {
        return "[" + (md == null ? "no metadata" : md.toString()) + "]";
    }

    // ---------------------------------------------------------------------
    private static int compareStrings(String s1, String s2) {
        if (s1 == null && s2 == null) {
            return 0;
        }

        if (s1 == null /* && s2 != null */) {
            return -1;
        }

        if (

            PluginInfo pluginInfo = extractPluginInfo(artifact);
            if (pluginInfo != null) {
                String key = pluginInfo.groupId;
                if (processedPlugins.get(key) == null) {
                    PluginsMetadata pluginMetadata = plugins.get(key);
                    if (pluginMetadata == null) {
                        pluginMetadata = new PluginsMetadata(pluginInfo, timestamp);

    return (javaUtilOptional == null) ? null : fromNullable(javaUtilOptional.orElse(null));
  }

  /**
   * Returns the equivalent {@code java.util.Optional} value to the given {@code
   * com.google.common.base.Optional}, or {@code null} if the argument is null.
   *
   * <p>If {@code googleOptional} is known to be non-null, use {@code googleOptional.toJavaUtil()}
   * instead.
   *

    Set<CombinedInterface> getSetProp() { return null; }

    Map<CombinedInterface, JavaClassWithParameterizedTypes> getMapProp() { return null; }

    List<?> getWildcardProp() { return null; }

    List<? extends CombinedInterface> getUpperBoundProp() { return null; }

    List<? super CombinedInterface> getLowerBoundProp() { return null; }

        try {
            org.apache.maven.api.model.Model model =
                    delegate.read(reader, strict, source != null ? source.toApiSource() : null);
            return new Model(model);
        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

    /**
     *
     * @param reader a reader object.
     * @param strict a strict object.

        return format(null, paths);
    }

    /**
     * Implementation shared with {@link Modular}.
     */
    final String[] format(String moduleName, Iterable<? extends Path> paths) {
        if (option == null) {
            throw new IllegalStateException("No option is associated to this path type.");
        }
        String prefix = (moduleName == null) ? "" : (moduleName + '=');

    targets:
      include:
      - '*'
  abbr: null
  attr_list: null
  footnotes: null
  md_in_html: null
  tables: null
  toc:
    permalink: true
  pymdownx.betterem: null
  pymdownx.caret: null
  pymdownx.highlight:
    line_spans: __span
  pymdownx.inlinehilite: null
  pymdownx.keys: null
  pymdownx.mark: null
  pymdownx.superfences:
    custom_fences:
    - name: mermaid

    if (entry != null && entry.key == key) {
      return entry.value;
    }
    entry = cacheEntry2;
    if (entry != null && entry.key == key) {
      // Promote second cache entry to first so the access pattern
      // [K1, K2, K1, K3, K1, K4...] still hits the cache half the time.
      addToCache(entry);
      return entry.value;
    }
    return null;
  }

  @Override
  void clearCache() {
    super.clearCache();

    Predicate<@Nullable Integer> isNull = Predicates.equalTo(null);
    assertTrue(isNull.apply(null));
    assertFalse(isNull.apply(1));
  }

  public void testIsEqualToNull_equality() {
    new EqualsTester()
        .addEqualityGroup(
            Predicates.<@Nullable Integer>equalTo(null),
            Predicates.<@Nullable Integer>equalTo(null))
        .addEqualityGroup(Predicates.equalTo(1))