/**
 * Implementation of {@link Multimaps#filterKeys(Multimap, Predicate)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
class FilteredKeyMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends AbstractMultimap<K, V> implements FilteredMultimap<K, V> {
  final Multimap<K, V> unfiltered;
  final Predicate<? super K> keyPredicate;

/**
 * Implementation of {@link Multimaps#filterKeys(Multimap, Predicate)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
class FilteredKeyMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends AbstractMultimap<K, V> implements FilteredMultimap<K, V> {
  final Multimap<K, V> unfiltered;
  final Predicate<? super K> keyPredicate;

 * FluentFuture.catching} family of methods. Those versions have slightly different signatures.
 */
abstract class GwtFluentFutureCatchingSpecialization<V extends @Nullable Object>
    extends AbstractFuture<V> {
  /*
   * In the GWT versions of the methods (below), every exceptionType parameter is required to be

 *
 * @author Mike Bostock
 * @since 2.0
 */
@GwtCompatible
@J2ktIncompatible
public final class EnumBiMap<K extends Enum<K>, V extends Enum<V>> extends AbstractBiMap<K, V> {
  /*
   * J2CL's EnumMap does not need the Class instance, so we can use Object.class instead. (Or we

    CHECKED(IOException.class),
    UNCHECKED(RuntimeException.class);

    final Class<? extends Exception> exceptionType;

    ExceptionType(Class<? extends Exception> exceptionType) {
      this.exceptionType = exceptionType;
    }
  }

  private static final ImmutableSet<Class<? extends Exception>> OTHER_EXCEPTION_TYPES =
      ImmutableSet.of(
          BackingStoreException.class,

public final class ListGenerators {

  private ListGenerators() {}

  public static class ImmutableListOfGenerator extends TestStringListGenerator {
    @Override
    protected List<String> create(String[] elements) {
      return ImmutableList.copyOf(elements);
    }
  }

  public static class BuilderAddListGenerator extends TestStringListGenerator {
    @Override
    protected List<String> create(String[] elements) {

 * invoke methods, they invoke methods on the {@code ForwardingMultimap}.
 *
 * @author Robert Konigsberg
 * @since 2.0
 */
@GwtCompatible
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
  protected abstract Multimap<K, V> delegate();

 * invoke methods, they invoke methods on the {@code ForwardingMultimap}.
 *
 * @author Robert Konigsberg
 * @since 2.0
 */
@GwtCompatible
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
  protected abstract Multimap<K, V> delegate();

     * @return a new instance of {@link ConcurrentHashMap}
     * @see ConcurrentHashMap#ConcurrentHashMap(Map)
     */
    public static <K, V> ConcurrentHashMap<K, V> newConcurrentHashMap(final Map<? extends K, ? extends V> m) {
        return new ConcurrentHashMap<>(m);
    }

    /**
     * Creates and returns a new instance of {@link ConcurrentLinkedQueue}.
     *

     */
    @CanIgnoreReturnValue
    @Override
    public Builder<E> addAll(Iterable<? extends E> elements) {
      if (elements instanceof Multiset) {
        Multiset<? extends E> multiset = (Multiset<? extends E>) elements;
        multiset.forEachEntry((e, n) -> contents.add(checkNotNull(e), n));
      } else {
        super.addAll(elements);
      }