import java.util.List;
import java.util.Set;
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) {

/**
 * Writes data passed to this stream as log messages.
 *
 * The stream will be flushed whenever a newline is detected.
 * Allows setting an optional prefix before each line of output.
 */
public abstract class LoggingOutputStream extends OutputStream {
    /** The starting length of the buffer */
    private static final int DEFAULT_BUFFER_LENGTH = 4096;

    /** The buffer of bytes sent to the stream */

 * {@link #sloppyTearDown()} instead.
 *
 * @author Luiz-Otavio Zorzella
 * @since 10.0
 */
@GwtCompatible
@NullMarked
public abstract class SloppyTearDown implements TearDown {
  private static final Logger logger = Logger.getLogger(SloppyTearDown.class.getName());

  @Override
  public final void tearDown() {
    try {
      sloppyTearDown();

 *
 * @author Charles Fry
 * @since 11.0
 */
@GwtIncompatible
public abstract class ForwardingLoadingCache<K, V> extends ForwardingCache<K, V>
    implements LoadingCache<K, V> {

  /** Constructor for use by subclasses. */
  protected ForwardingLoadingCache() {}

  @Override
  protected abstract LoadingCache<K, V> delegate();

  @CanIgnoreReturnValue // TODO(b/27479612): consider removing this

 *
 * @author Shardul Deo
 * @since 4.0
 */
@GwtCompatible
public abstract class ForwardingListenableFuture<V extends @Nullable Object>
    extends ForwardingFuture<V> implements ListenableFuture<V> {

  /** Constructor for use by subclasses. */
  protected ForwardingListenableFuture() {}

  @Override
  protected abstract ListenableFuture<? extends V> delegate();

  @Override

/** Forwarding wrapper around a {@code Condition}. */
@SuppressWarnings("WaitNotInLoop") // We are just delegating; _our user_ must loop.
@J2ktIncompatible
@GwtIncompatible
abstract class ForwardingCondition implements Condition {
  abstract Condition delegate();

  @Override
  public void await() throws InterruptedException {
    delegate().await();
  }

  @Override

import org.codelibs.fess.suggest.concurrent.Deferred;
import org.opensearch.transport.client.Client;

/**
 * An abstract class that serves as a builder for creating and executing requests.
 *
 * @param <Req> the type of the request
 * @param <Res> the type of the response
 */
public abstract class RequestBuilder<Req extends Request<Res>, Res extends Response> {
    /** The OpenSearch client. */
    protected Client client;

 *
 * @author Kurt Alfred Kluever
 * @since 3.0
 */
@GwtCompatible
public abstract class ForwardingListMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends ForwardingMultimap<K, V> implements ListMultimap<K, V> {

  /** Constructor for use by subclasses. */
  protected ForwardingListMultimap() {}

  @Override
  protected abstract ListMultimap<K, V> delegate();

  @Override

 * @since 3.0
 */
@GwtCompatible
public abstract class ForwardingSortedSetMultimap<
        K extends @Nullable Object, V extends @Nullable Object>
    extends ForwardingSetMultimap<K, V> implements SortedSetMultimap<K, V> {

  /** Constructor for use by subclasses. */
  protected ForwardingSortedSetMultimap() {}

  @Override
  protected abstract SortedSetMultimap<K, V> delegate();

  @Override

 *
 * @author Sven Mawson
 * @since 1.0
 */
@GwtCompatible
public abstract class ForwardingFuture<V extends @Nullable Object> extends ForwardingObject
    implements Future<V> {
  /** Constructor for use by subclasses. */
  protected ForwardingFuture() {}

  @Override
  protected abstract Future<? extends V> delegate();

  @Override
  @CanIgnoreReturnValue