assertEquals(
        "getOrDefault(present, def) should return the associated value",
        v0(),
        getMap().getOrDefault(k0(), v3()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testGetOrDefault_presentNullDefault() {
    assertEquals(
        "getOrDefault(present, null) should return the associated value",
        v0(),
        getMap().getOrDefault(k0(), null));
  }

    assertEquals(
        "getOrDefault(present, def) should return the associated value",
        v0(),
        getMap().getOrDefault(k0(), v3()));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testGetOrDefault_presentNullDefault() {
    assertEquals(
        "getOrDefault(present, null) should return the associated value",
        v0(),
        getMap().getOrDefault(k0(), null));
  }

                .getOrDefault("os.name", Os.OS_NAME)
                .toLowerCase(Locale.ENGLISH);
        String actualOsArch = context.getSystemProperties()
                .getOrDefault("os.arch", Os.OS_ARCH)
                .toLowerCase(Locale.ENGLISH);
        String actualOsVersion = context.getSystemProperties()
                .getOrDefault("os.version", Os.OS_VERSION)

        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public String getOrDefault(final String key, final String defaultValue) {
                if ("rag.chat.history.assistant.content".equals(key)) {
                    return "full";
                }
                return defaultValue;

    private MavenProject getProject(Artifact artifact, Map<String, Map<String, Map<String, MavenProject>>> projects) {
        return projects.getOrDefault(artifact.getGroupId(), Collections.emptyMap())
                .getOrDefault(artifact.getArtifactId(), Collections.emptyMap())
                .getOrDefault(artifact.getBaseVersion(), null);
    }

    // groupId -> (artifactId -> (version -> project)))

        }

        private <Q> Supplier<Q> getBeanSupplier(Dependency<Q> dep, Key<Q> key) {
            List<Binding<?>> list = new ArrayList<>();
            // Add DI bindings
            list.addAll(getBindings().getOrDefault(key, Set.of()));
            // Add Plexus bindings
            for (var bean : locator.get().locate(toGuiceKey(key))) {
                if (isPlexusBean(bean)) {

        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public String getOrDefault(final String key, final String defaultValue) {
                if ("rag.chat.message.max.length".equals(key)) {
                    return defaultValue;
                }
                return defaultValue;

    @Override
    public int hashCode() {
        return parent.hashCode();
    }

    @Override
    public V getOrDefault(final Object key, final V defaultValue) {
        final V value = parent.get(key);
        if (value != null) {
            return value;
        }
        return parent.getOrDefault(toCamelCase(key), defaultValue);
    }

    @Override

     * @return the environment variable value, or the default value if not found
     */
    public static String getEnv(String key, String defaultValue) {
        return System.getenv().getOrDefault(key, defaultValue);
    }

    /**
     * Provider for current time in milliseconds. Can be overridden for testing.
     */
    private static LongSupplier timeProvider = System::currentTimeMillis;

     *
     * - a `getFooOrDefault(@Nullable Foo defaultValue)` method that returns
     *   `map.getOrDefault(FOO_KEY, defaultValue)`
     *
     * - a call that consults a chain of maps, as in `mapA.getOrDefault(key, mapB.getOrDefault(key,
     *   ...))`
     *
     * So it makes sense for the parameter (and thus the return type) to be @Nullable.
     *
     * Two other points:
     *