import java.util.LinkedHashSet;
import java.util.ListIterator;
import java.util.Set;

/**
 * A method supported by implementations of the {@link Iterator} or {@link ListIterator} interface.
 *
 * <p>This enum is GWT compatible.
 *
 * @author Chris Povirk
 */
@GwtCompatible
public enum IteratorFeature {
  /** Support for {@link Iterator#remove()}. */
  SUPPORTS_REMOVE,
  /**

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import java.util.SortedSet;

/**
 * GWT emulation of {@link RegularImmutableSortedSet}.
 *
 * @author Hayward Chan
 */
final class RegularImmutableSortedSet<E> extends ImmutableSortedSet<E> {
  /** true if this set is a subset of another immutable sorted set. */

 */

package com.google.common.collect;

import static java.util.Collections.emptyList;
import static java.util.Collections.unmodifiableList;

import java.util.List;

/**
 * GWT emulated version of {@link RegularImmutableList}.
 *
 * @author Hayward Chan
 */
final class RegularImmutableList<E> extends ForwardingImmutableList<E> {

 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkNotNull;

import org.jspecify.annotations.Nullable;

/**
 * GWT emulation of {@link SingletonImmutableSet}.
 *
 * @author Hayward Chan
 */
final class SingletonImmutableSet<E> extends ImmutableSet<E> {
  private final E element;

  SingletonImmutableSet(E element) {

   * @return the escaped form of {@code string}
   * @throws NullPointerException if {@code string} is null
   */
  @Override
  public String escape(String string) {
    checkNotNull(string); // GWT specific check (do not optimize)
    // Inlineable fast-path loop which hands off to escapeSlow() only if needed
    int length = string.length();
    for (int index = 0; index < length; index++) {

import junit.framework.AssertionFailedError;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible
@NullMarked
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {

import java.util.Arrays;
import java.util.Map;
import java.util.Set;
import org.jspecify.annotations.Nullable;

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

import junit.framework.AssertionFailedError;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible
@NullMarked
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {

 *
 * <p>{@code GwtTestSuiteGenerator} expects every {@code DerivedIterator} implementation to provide
 * a one-arg constructor accepting its inner generator as an argument. This requirement enables it
 * to generate source code (since GWT cannot use reflection to generate the suites).
 *
 * @author Chris Povirk
 */
@GwtCompatible
public interface DerivedGenerator {
  TestSubjectGenerator<?> getInnerGenerator();

 *
 * <p>{@code GwtTestSuiteGenerator} expects every {@code DerivedIterator} implementation to provide
 * a one-arg constructor accepting its inner generator as an argument. This requirement enables it
 * to generate source code (since GWT cannot use reflection to generate the suites).
 *
 * @author Chris Povirk
 */
@GwtCompatible
public interface DerivedGenerator {
  TestSubjectGenerator<?> getInnerGenerator();