private NavigableSet<E> navigableSet;
  private List<E> values;
  private E a;
  private E b;
  private E c;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    navigableSet = (NavigableSet<E>) getSet();
    values =
        copyToList(
            getSubjectGenerator()

  private Target nonEmptyProperSubset;
  private Target sameElements;
  private Target partialOverlap;
  private Target containsDuplicates;
  private Target nullSingleton;

  @Override
  public void setUp() throws Exception {
    super.setUp();

    empty = new Target(emptyCollection(), "empty");
    /*
     * We test that nullSingleton.retainAll(disjointList) does NOT throw a

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.net.URL;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.nio.file.Files;

import org.codelibs.core.exception.IORuntimeException;
import org.codelibs.core.net.URLUtil;
import org.codelibs.core.nio.ChannelUtil;

constraints.UriType.message = {item} heeft een onherkenbare URI.
constraints.CronExpression.message = {item} is geen geldige CRON-uitdrukking.

# ----------------------------------------------------------
# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = Inloggen mislukt.

constraints.UriType.message = {item} имеет нераспознанный URI.
constraints.CronExpression.message = {item} - неверное выражение CRON.

# ----------------------------------------------------------
# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = Ошибка входа.

                try {
                    list.add(new LabelTypePattern(labelType.getValue(), includedPaths, excludedPaths));
                } catch (final Exception e) {
                    logger.warn("Failed to create a matching pattern of a label: {}, includedPaths:{}, excludedPaths:{}",
                            labelType.getValue(), includedPaths, excludedPaths, e);
                }

 */
@DisplayName("Smb2Constants Test Suite")
class Smb2ConstantsTest {

    @Test
    @DisplayName("Should have private constructor to prevent instantiation")
    void testPrivateConstructor() throws Exception {
        // Verify constructor is private
        Constructor<Smb2Constants> constructor = Smb2Constants.class.getDeclaredConstructor();

└── fess-crawler-opensearch/  # OpenSearch backend
```

### Key Components

#### Core Engine
- **Crawler**: Main orchestrator managing crawl execution
- **CrawlerContext**: Execution context and configuration
- **CrawlerThread**: Individual crawler thread implementation

#### Client Architecture
- **HcHttpClient**: HTTP/HTTPS client using Apache HttpComponents

import org.dbflute.cbean.ConditionBean;
import org.dbflute.cbean.coption.CursorSelectOption;
import org.dbflute.cbean.result.ListResultBean;
import org.dbflute.exception.FetchingOverSafetySizeException;
import org.dbflute.exception.IllegalBehaviorStateException;
import org.dbflute.util.DfTypeUtil;
import org.opensearch.action.DocWriteResponse.Result;
import org.opensearch.action.admin.indices.refresh.RefreshResponse;

   */
  @GwtIncompatible
  @J2ktIncompatible
    private void writeObject(ObjectOutputStream stream) throws IOException {
    stream.defaultWriteObject();
    Serialization.writeMultimap(this, stream);
  }

  @GwtIncompatible
  @J2ktIncompatible
    private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
    stream.defaultReadObject();
    int keyCount = stream.readInt();