import java.util.Arrays;
import java.util.Collection;
import java.util.List;

/**
 * Abstract superclass of all test-suite builders for collection interfaces.
 *
 * @author George van den Driessche
 */
@GwtIncompatible
public abstract class AbstractCollectionTestSuiteBuilder<
        B extends AbstractCollectionTestSuiteBuilder<B, E>, E>

import java.util.Collections;
import java.util.List;
import org.jspecify.annotations.Nullable;

/** Aggregate future that collects (stores) results of each future. */
@GwtCompatible
abstract class CollectionFuture<V extends @Nullable Object, C extends @Nullable Object>
    extends AggregateFuture<V, C> {
  /*
   * We access this field racily but safely. For discussion of a similar situation, see the comments

import jcifs.util.Strings;

/**
 * Base class for all SMB1/CIFS protocol message blocks.
 * This abstract class provides the fundamental structure and common functionality for SMB1 request
 * and response messages, including header fields, message encoding/decoding, and wire format handling.
 */
public abstract class ServerMessageBlock implements CommonServerMessageBlockRequest, CommonServerMessageBlockResponse, RequestWithPath {

 *
 * @author Louis Wasserman
 */
public abstract class ForwardingSortedMultiset<E extends @Nullable Object>
    extends ForwardingMultiset<E> implements SortedMultiset<E> {
  /** Constructor for use by subclasses. */
  protected ForwardingSortedMultiset() {}

  @Override
  protected abstract SortedMultiset<E> delegate();

  @Override
  public SortedSet<E> elementSet() {

 * the garbage collector reclaims the referent. This is a simpler alternative to using a {@link
 * ReferenceQueue}.
 *
 * @author Bob Lee
 * @since 2.0
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class FinalizableSoftReference<T> extends SoftReference<T>
    implements FinalizableReference {
  /**
   * Constructs a new finalizable soft reference.
   *
   * @param referent to softly reference

 * -----------
 *
 * Tasks are bound to the [TaskQueue] they are scheduled in. Each queue is sequential and the tasks
 * within it never execute concurrently. It is an error to use a task in multiple queues.
 */
abstract class Task(
  val name: String,
  val cancelable: Boolean = true,
) {
  // Guarded by the TaskRunner.
  internal var queue: TaskQueue? = null

  /** Undefined unless this is in [TaskQueue.futureTasks]. */

 * @since 4.0
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class ForwardingBlockingQueue<E> extends ForwardingQueue<E>
    implements BlockingQueue<E> {

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

  @Override
  protected abstract BlockingQueue<E> delegate();

  @CanIgnoreReturnValue
  @Override

import java.util.Arrays;
import java.util.Collection;
import java.util.List;

/**
 * Abstract superclass of all test-suite builders for collection interfaces.
 *
 * @author George van den Driessche
 */
@GwtIncompatible
public abstract class AbstractCollectionTestSuiteBuilder<
        B extends AbstractCollectionTestSuiteBuilder<B, E>, E>

import org.codelibs.core.exception.InvocationTargetRuntimeException;

/**
 * Utility class for {@link Constructor} operations.
 *
 * @author higa
 */
public abstract class ConstructorUtil {

    /**
     * Do not instantiate.
     */
    protected ConstructorUtil() {
    }

    /**

import com.google.common.util.concurrent.AbstractFuture.Listener;
import com.google.common.util.concurrent.internal.InternalFutureFailureAccess;
import org.jspecify.annotations.Nullable;

abstract class AbstractFutureState<V extends @Nullable Object> extends InternalFutureFailureAccess
    implements ListenableFuture<V> {
  final boolean casListeners(@Nullable Listener expect, Listener update) {
    if (listeners == expect) {