} else {
      return Collections.unmodifiableMap(map);
    }
  }

  private static class MapDifferenceImpl<K extends @Nullable Object, V extends @Nullable Object>
      implements MapDifference<K, V> {
    final Map<K, V> onlyOnLeft;
    final Map<K, V> onlyOnRight;
    final Map<K, V> onBoth;
    final Map<K, ValueDifference<V>> differences;

    MapDifferenceImpl(

    } else {
      return Collections.unmodifiableMap(map);
    }
  }

  private static class MapDifferenceImpl<K extends @Nullable Object, V extends @Nullable Object>
      implements MapDifference<K, V> {
    final Map<K, V> onlyOnLeft;
    final Map<K, V> onlyOnRight;
    final Map<K, V> onBoth;
    final Map<K, ValueDifference<V>> differences;

    MapDifferenceImpl(

  "nullness", // too much trouble for the payoff
})
@GwtCompatible
@NullUnmarked // TODO(cpovirk): Annotate for nullness.
final class LocalCache<K, V> extends AbstractMap<K, V> implements ConcurrentMap<K, V> {

  /*
   * The basic strategy is to subdivide the table among Segments, each of which itself is a
   * concurrently readable hash table. The map supports non-blocking reads and concurrent writes

    DummyValueReference<K, V> valueRef = DummyValueReference.create(value);
    entry.setValueReference(valueRef);
    return entry;
  }

  static class DummyEntry<K, V> implements ReferenceEntry<K, V> {
    private @Nullable K key;
    private final int hash;
    private final ReferenceEntry<K, V> next;

    public DummyEntry(K key, int hash, ReferenceEntry<K, V> next) {

    DummyValueReference<K, V> valueRef = DummyValueReference.create(value);
    entry.setValueReference(valueRef);
    return entry;
  }

  static class DummyEntry<K, V> implements ReferenceEntry<K, V> {
    private @Nullable K key;
    private final int hash;
    private final ReferenceEntry<K, V> next;

    public DummyEntry(K key, int hash, ReferenceEntry<K, V> next) {

 * once created, the abstract pathname represented by an SmbFile object
 * will never change.
 *
 * @see       java.io.File
 */

public class SmbFile extends URLConnection implements SmbConstants {

    static final int O_RDONLY = 0x01;
    static final int O_WRONLY = 0x02;
    static final int O_RDWR = 0x03;
    static final int O_APPEND = 0x04;

    // Open Function Encoding

 * once created, the abstract pathname represented by an SmbFile object
 * will never change.
 *
 * @see java.io.File
 */

public class SmbFile extends URLConnection implements SmbResource, SmbConstants {
    /**
     * Mask for attributes that can be retrieved from the server
     */
    protected static final int ATTR_GET_MASK = 0x7FFF;
    /**

import jakarta.annotation.PreDestroy;

/**
 * Client for interacting with OpenSearch search engine.
 * Provides document indexing, searching, and administrative operations.
 */
public class SearchEngineClient implements Client {

    /**
     * Default constructor.
     */
    public SearchEngineClient() {
        // Default constructor
    }