private static final byte[] ZERO_IV = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

    /**
     * Calculates a MAC using the ARCFOUR-HMAC-MD5 algorithm.
     * This method implements the Microsoft variant of the Kerberos ARCFOUR-HMAC-MD5 checksum.
     *
     * @param keyusage the Kerberos key usage number for this operation
     * @param key the encryption key to use for MAC calculation

 *
 * The authenticator supports various configuration options including delegation,
 * basic authentication fallback, and localhost authentication bypass.
 */
public class SpnegoAuthenticator implements SsoAuthenticator {

    /** Logger for this class. */
    private static final Logger logger = LogManager.getLogger(SpnegoAuthenticator.class);

    /** Configuration key for SPNEGO initialization status. */

  }

  private static final class ContainsMultiset implements Serializable {
    private final ConcurrentHashMultiset<?> multiset;

    ContainsMultiset(ConcurrentHashMultiset<?> multiset) {
      this.multiset = multiset;
    }
  }

  private static final class ContainsBothWithMultisetFirst implements Serializable {
    private final ConcurrentHashMultiset<?> a;

   *
   * @since 15.0 (since 12.0 in HashCodes)
   */
  public static HashCode fromInt(int hash) {
    return new IntHashCode(hash);
  }

  private static final class IntHashCode extends HashCode implements Serializable {
    final int hash;

    IntHashCode(int hash) {
      this.hash = hash;
    }

    @Override
    public int bits() {
      return 32;
    }

    @Override

import java.util.Iterator;
import java.util.Map;
import java.util.Set;

/**
 * {@link Set} that is case-insensitive.
 *
 * @author higa
 */
public class CaseInsensitiveSet extends AbstractSet<String> implements Set<String>, Serializable {

    static final long serialVersionUID = 0L;

    private transient Map<String, Object> map = new CaseInsensitiveMap<>();

    private static final Object PRESENT = new Object();

import javax.inject.Singleton;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 */
@Named
@Singleton
@Deprecated
public class DefaultResolutionErrorHandler implements ResolutionErrorHandler {

    @Override
    public void throwErrors(ArtifactResolutionRequest request, ArtifactResolutionResult result)
            throws ArtifactResolutionException {
        // Metadata cannot be found

 *
 * @author Luke Sandberg
 */
@J2ktIncompatible
@GwtIncompatible
abstract class WrappingScheduledExecutorService extends WrappingExecutorService
    implements ScheduledExecutorService {
  final ScheduledExecutorService delegate;

  protected WrappingScheduledExecutorService(ScheduledExecutorService delegate) {
    super(delegate);
    this.delegate = delegate;
  }

import org.jspecify.annotations.NullMarked;

/**
 * Create integer sets for collection tests.
 *
 * @author Gregory Kick
 */
@GwtCompatible
@NullMarked
public abstract class TestIntegerSetGenerator implements TestSetGenerator<Integer> {
  @Override
  public SampleElements<Integer> samples() {
    return new Ints();
  }

  @Override
  public Set<Integer> create(Object... elements) {

/**
 * An abstract {@code TestMultisetGenerator} for generating multisets containing enum values.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public abstract class TestEnumMultisetGenerator implements TestMultisetGenerator<AnEnum> {
  @Override
  public SampleElements<AnEnum> samples() {
    return new Enums();
  }

  @Override
  public Multiset<AnEnum> create(Object... elements) {

 * elements.
 */
@GwtCompatible
final class ByFunctionOrdering<F extends @Nullable Object, T extends @Nullable Object>
    extends Ordering<F> implements Serializable {
  final Function<F, ? extends T> function;
  final Ordering<T> ordering;

  ByFunctionOrdering(Function<F, ? extends T> function, Ordering<T> ordering) {
    this.function = checkNotNull(function);