private void periodicMaintenance() {
        if (shutdown) {
            return;
        }

        lock.writeLock().lock();
        try {
            // Clean up expired handles
            handles.entrySet().removeIf(entry -> {
                HandleInfo info = entry.getValue();
                if (info.isExpired() && !info.isReconnecting()) {
                    guidToHandle.remove(info.getCreateGuid());

        final Properties props = new Properties(mailProperties);
        if (params != null) {
            for (final Map.Entry<String, String> entry : params.entrySet()) {
                props.put(entry.getKey(), entry.getValue());
            }
        }
        try {
            final Session mailSession = Session.getDefaultInstance(props, null);

        if (!autoCleanupEnabled) {
            return;
        }

        int cleaned = 0;
        long now = System.currentTimeMillis();

        for (Map.Entry<String, ResourceHolder> entry : activeResources.entrySet()) {
            ResourceHolder holder = entry.getValue();

            // Check if resource is abandoned
            if (!holder.closed && !holder.isAlive()) {

        final Map<TypeVariable<?>, Type> map = GenericsUtil.getTypeVariableMap(Hoge.class);
        assertThat(map.size(), is(4));
        final Iterator<Entry<TypeVariable<?>, Type>> it = map.entrySet().iterator();
        Entry<TypeVariable<?>, Type> entry = it.next();
        assertThat(entry.getKey().getName(), is("T1"));
        assertThat(entry.getValue(), is(sameClass(Integer.class)));
        entry = it.next();

        Equivalence.equals()
            .onResultOf(
                (ImmutableSetMultimap<?, ?> mm) ->
                    ImmutableListMultimap.copyOf(mm).asMap().entrySet().asList())
            .and(Equivalence.equals());
    CollectorTester.of(collector, equivalence)
        .expectCollects(ImmutableSetMultimap.of())
        .expectCollects(

            RenderDataUtil.register(data, "path", path);
            RenderDataUtil.register(data, "name", name);
            final Map<String, String> tags = new HashMap<>();
            getObjectTags(getObjectName(path, name)).entrySet().forEach(e -> {
                final int index = tags.size() / 2 + 1;
                tags.put("name" + index, e.getKey());
                tags.put("value" + index, e.getValue());
            });

            }
        }

        if (infoMap != null) {
            final List<CrawlingInfoParam> crawlingInfoParamList = new ArrayList<>();
            for (final Map.Entry<String, String> entry : infoMap.entrySet()) {
                final CrawlingInfoParam crawlingInfoParam = new CrawlingInfoParam();
                crawlingInfoParam.setCrawlingInfoId(crawlingInfo.getId());
                crawlingInfoParam.setKey(entry.getKey());

        final Map<String, Object> newDataMap = new LinkedHashMap<>();
        for (final Map.Entry<String, Object> e : dataMap.entrySet()) {
            if (fieldConfigs.getConfig(e.getKey()).map(FieldConfigs.Config::isOverwrite).orElse(false)
                    && e.getValue() instanceof final Object[] values && values.length > 0) {

        if (embeddedFileNames == null || embeddedFileNames.isEmpty()) {
            return;
        }

        for (final Map.Entry<String, PDComplexFileSpecification> ent : embeddedFileNames.entrySet()) {
            final PDComplexFileSpecification spec = ent.getValue();
            if (spec != null) {
                final PDEmbeddedFile embeddedFile = getEmbeddedFile(spec);

    Multiset<String> multiset = HashMultiset.create(asList("a", "a", "a", "b", "c", "c"));
    ImmutableMultiset<String> sortedMultiset = Multisets.copyHighestCountFirst(multiset);

    assertThat(sortedMultiset.entrySet())
        .containsExactly(
            Multisets.immutableEntry("a", 3),
            Multisets.immutableEntry("c", 2),
            Multisets.immutableEntry("b", 1))
        .inOrder();