* invoke methods, they invoke methods on the {@code ForwardingMultimap}.
 *
 * @author Robert Konigsberg
 * @since 2.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class ForwardingMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends ForwardingObject implements Multimap<K, V> {

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

  @Override

 * invoke methods, they invoke methods on the {@code ForwardingMultimap}.
 *
 * @author Robert Konigsberg
 * @since 2.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class ForwardingMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends ForwardingObject implements Multimap<K, V> {

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

  @Override

import com.google.common.base.Function;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.ForwardingWrapperTester;
import junit.framework.TestCase;

/**
 * Unit test for {@link ForwardingMultimap}.
 *
 * @author Hayward Chan
 */
public class ForwardingMultimapTest extends TestCase {

  @SuppressWarnings("rawtypes")
  public void testForwarding() {
    new ForwardingWrapperTester()

import com.google.common.base.Function;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.ForwardingWrapperTester;
import junit.framework.TestCase;

/**
 * Unit test for {@link ForwardingMultimap}.
 *
 * @author Hayward Chan
 */
public class ForwardingMultimapTest extends TestCase {

  @SuppressWarnings("rawtypes")
  public void testForwarding() {
    new ForwardingWrapperTester()

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

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

  @Override
  public Set<Entry<K, V>> entries() {
    return delegate().entries();
  }

 *
 * @author Kurt Alfred Kluever
 * @since 3.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
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

 *
 * @author Kurt Alfred Kluever
 * @since 3.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
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

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

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

  @Override
  public Set<Entry<K, V>> entries() {
    return delegate().entries();
  }

   * populate a map to be passed to {@link Multimaps#forMap(Map)}. All tests should run against the
   * result of {@link #build()}.
   */
  private static final class PopulatableMapAsMultimap<K, V> extends ForwardingMultimap<K, V> {
    final Map<K, V> map;
    final SetMultimap<K, V> unusableDelegate;

    static <K, V> PopulatableMapAsMultimap<K, V> create() {
      return new PopulatableMapAsMultimap<>();
    }

   * populate a map to be passed to {@link Multimaps#forMap(Map)}. All tests should run against the
   * result of {@link #build()}.
   */
  private static final class PopulatableMapAsMultimap<K, V> extends ForwardingMultimap<K, V> {
    final Map<K, V> map;
    final SetMultimap<K, V> unusableDelegate;

    static <K, V> PopulatableMapAsMultimap<K, V> create() {
      return new PopulatableMapAsMultimap<>();
    }