* Entry}.
 *
 * @author Jared Levy
 */
@GwtCompatible
abstract class AbstractMapEntry<K extends @Nullable Object, V extends @Nullable Object>
    implements Entry<K, V> {

  @Override
  @ParametricNullness
  public abstract K getKey();

  @Override
  @ParametricNullness
  public abstract V getValue();

  @Override
  @ParametricNullness

 */
@SuppressWarnings("serial") // we're overriding default serialization
public abstract class ImmutableCollection<E> extends AbstractCollection<E> implements Serializable {
  static final int SPLITERATOR_CHARACTERISTICS =
      Spliterator.IMMUTABLE | Spliterator.NONNULL | Spliterator.ORDERED;

  ImmutableCollection() {}

  @Override
  public abstract UnmodifiableIterator<E> iterator();

  @Override

import com.google.common.collect.testing.SampleElements.Enums;
import java.util.List;
import org.jspecify.annotations.NullMarked;

/**
 * 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() {

 */
@SuppressWarnings("rawtypes") // https://github.com/google/guava/issues/989
@GwtIncompatible
abstract class AbstractRangeSet<C extends Comparable> implements RangeSet<C> {
  AbstractRangeSet() {}

  @Override
  public boolean contains(C value) {
    return rangeContaining(value) != null;
  }

  @Override
  public abstract @Nullable Range<C> rangeContaining(C value);

  @Override
  public boolean isEmpty() {

 */

package jcifs.netbios;

import java.io.IOException;
import java.io.InputStream;

/**
 * Abstract base class for NetBIOS session service packets.
 * This class provides common functionality for session layer communication.
 */
public abstract class SessionServicePacket {

    /**
     * Default constructor for SessionServicePacket.
     * Creates a new session service packet instance.

import org.jspecify.annotations.NullMarked;

/**
 * Creates collections containing unhashable sample elements, to be tested.
 *
 * @author Regina O'Dell
 */
@GwtCompatible
@NullMarked
public abstract class TestUnhashableCollectionGenerator<T extends Collection<UnhashableObject>>
    implements TestCollectionGenerator<UnhashableObject> {
  @Override
  public SampleElements<UnhashableObject> samples() {

    }

    protected ClassWorld createClassWorld() {
        return new ClassWorld("plexus.core", ClassLoader.getSystemClassLoader());
    }

    protected abstract Invoker createInvoker(ClassWorld classWorld);

    protected abstract Parser createParser();

import org.apache.maven.cling.invoker.mvnenc.EncryptInvoker;
import org.codehaus.plexus.components.secdispatcher.SecDispatcher;

/**
 * The support class for interactive goal implementations.
 */
public abstract class InteractiveGoalSupport extends GoalSupport {
    protected InteractiveGoalSupport(MessageBuilderFactory messageBuilderFactory, SecDispatcher secDispatcher) {
        super(messageBuilderFactory, secDispatcher);
    }

 * <ul>
 *   <li>ID: Using the {@code combine.id} attribute</li>
 *   <li>Keys: Using the {@code combine.keys} attribute with comma-separated key names</li>
 * </ul>
 *
 * @since 4.0.0
 */
public abstract class XmlService {

    /** Attribute name controlling how child elements are combined */
    public static final String CHILDREN_COMBINATION_MODE_ATTRIBUTE = "combine.children";

  }

  private abstract static class FailToForward extends ForwardingObject implements Runnable {
    @Override
    public void run() {}
  }

  private abstract static class ForwardToDelegate extends ForwardingObject implements Runnable {
    @Override
    public void run() {
      delegate().run();
    }

    @Override
    protected abstract Runnable delegate();
  }