return _columnUpdatedTime;
    }

    public ColumnInfo columnVirtualHosts() {
        return _columnVirtualHosts;
    }

    protected List<ColumnInfo> ccil() {
        List<ColumnInfo> ls = newArrayList();
        ls.add(columnAvailable());
        ls.add(columnBoost());
        ls.add(columnConfigParameter());
        ls.add(columnCreatedBy());
        ls.add(columnCreatedTime());
        ls.add(columnDepth());

        return _columnUpdatedBy;
    }

    public ColumnInfo columnUpdatedTime() {
        return _columnUpdatedTime;
    }

    protected List<ColumnInfo> ccil() {
        List<ColumnInfo> ls = newArrayList();
        ls.add(columnBoost());
        ls.add(columnCreatedBy());
        ls.add(columnCreatedTime());
        ls.add(columnPermissions());
        ls.add(columnReading());
        ls.add(columnSuggestWord());

        return _columnUrl;
    }

    public ColumnInfo columnUserSessionId() {
        return _columnUserSessionId;
    }

    protected List<ColumnInfo> ccil() {
        List<ColumnInfo> ls = newArrayList();
        ls.add(columnUrlId());
        ls.add(columnDocId());
        ls.add(columnOrder());
        ls.add(columnQueryId());
        ls.add(columnQueryRequestedAt());
        ls.add(columnRequestedAt());

      return new SampleElements<>("january", "february", "march", "april", "may");
    }

    @Override
    public Collection<String> createCollection(Iterable<? extends String> values) {
      return Lists.newArrayList(values);
    }

    @Override
    public SampleElements<Entry<String, String>> samples() {
      return new SampleElements<>(
          mapEntry("one", "january"),
          mapEntry("two", "february"),

### Collection Utilities with Java 21 Support
```java
import org.codelibs.core.collection.CollectionsUtil;
import java.util.SequencedCollection;

// Enhanced collection creation
List<String> list = CollectionsUtil.newArrayList();
Map<String, Object> map = CollectionsUtil.newLinkedHashMap();
Set<String> caseInsensitiveSet = new CaseInsensitiveSet<>();

// Java 21 Sequenced Collections support

        <constraint name="__context__" within="" contains=""...

  }

  public void testEncloseAll_nullValue() {
    List<@Nullable Integer> nullFirst = Lists.newArrayList(null, 0);
    assertThrows(NullPointerException.class, () -> Range.encloseAll((List<Integer>) nullFirst));
    List<@Nullable Integer> nullNotFirst = Lists.newArrayList(0, null);
    assertThrows(NullPointerException.class, () -> Range.encloseAll((List<Integer>) nullNotFirst));
  }

        return _columnUserAgent;
    }

    public ColumnInfo columnVirtualHosts() {
        return _columnVirtualHosts;
    }

    protected List<ColumnInfo> ccil() {
        List<ColumnInfo> ls = newArrayList();
        ls.add(columnAvailable());
        ls.add(columnBoost());
        ls.add(columnConfigParameter());
        ls.add(columnCreatedBy());
        ls.add(columnCreatedTime());
        ls.add(columnDepth());

    Supplier<ArrayList<Integer>> listSupplier =
        new Supplier<ArrayList<Integer>>() {
          @Override
          public ArrayList<Integer> get() {
            return Lists.newArrayList(0);
          }
        };

    Function<List<Integer>, List<Integer>> addElementFunction =
        new Function<List<Integer>, List<Integer>>() {
          @Override

  }

  private static TestSuite wrappedHashMapTests(
      WrappedHashMapGenerator generator, String name, Feature<?>... features) {
    List<Feature<?>> featuresList = Lists.newArrayList(features);
    Collections.addAll(
        featuresList,
        MapFeature.GENERAL_PURPOSE,
        CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
        CollectionSize.ANY);