import com.google.common.primitives.Chars;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

/**
 * Common generators of different types of lists.
 *
 * @author Hayward Chan
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public final class ListGenerators {

  private ListGenerators() {}

  public static class ImmutableListOfGenerator extends TestStringListGenerator {

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()
        .testForwarding(
            Multimap.class,

import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A GWT-only class only used by GWT emulations. It is used to consolidate the definitions of method
 * delegation to save code size.
 *
 * @author Hayward Chan
 */
// TODO: Make this class GWT serializable.
@ElementTypesAreNonnullByDefault
class ForwardingImmutableCollection<E> extends ImmutableCollection<E> {

  final transient Collection<E> delegate;

import java.util.Collections;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * GWT emulation of {@link SingletonImmutableBiMap}.
 *
 * @author Hayward Chan
 */
@ElementTypesAreNonnullByDefault
final class SingletonImmutableBiMap<K, V> extends ImmutableBiMap<K, V> {

  // These references are used both by the custom field serializer, and by the

 * limitations under the License.
 */

package com.google.common.collect.testing.testers;

import com.google.common.annotations.GwtCompatible;

/**
 * The emulation source used in GWT.
 *
 * @author Hayward Chan
 */
@GwtCompatible(emulated = true)
final class Platform {

  // Use fewer steps in the ListIteratorTester in ListListIteratorTester because it's slow in prod
  // mode.

 * singleton and regular maps respectively. For sorted maps, it's a thin wrapper around {@link
 * java.util.TreeMap}.
 *
 * @see ImmutableSortedMap
 * @author Hayward Chan
 */
@ElementTypesAreNonnullByDefault
public abstract class ImmutableMap<K, V> implements Map<K, V>, Serializable {

  abstract static class IteratorBasedImmutableMap<K, V> extends ImmutableMap<K, V> {

import java.util.Map;
import java.util.Set;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * @author Hayward Chan
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class Platform {
  /** Returns the platform preferred implementation of a map based on a hash table. */

import java.util.Set;
import java.util.SortedSet;

/**
 * Generators of different types of sets and derived collections from sets.
 *
 * @author Kevin Bourrillion
 * @author Jared Levy
 * @author Hayward Chan
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class SetGenerators {

  public static class ImmutableSetCopyOfGenerator extends TestStringSetGenerator {
    @Override

import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

/**
 * Generators of different types of map and related collections, such as keys, entries and values.
 *
 * @author Hayward Chan
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public class MapGenerators {
  public static class ImmutableMapGenerator extends TestStringMapGenerator {
    @Override

import java.util.Set;
import java.util.SortedSet;

/**
 * Generators of different types of sets and derived collections from sets.
 *
 * @author Kevin Bourrillion
 * @author Jared Levy
 * @author Hayward Chan
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class SetGenerators {

  public static class ImmutableSetCopyOfGenerator extends TestStringSetGenerator {
    @Override