* PeekingIterator}</a>.
 *
 * @author Mick Killianey
 * @since 2.0
 */
@DoNotMock("Use Iterators.peekingIterator")
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface PeekingIterator<E extends @Nullable Object> extends Iterator<E> {
  /**
   * Returns the next element in the iteration, without advancing the iteration.
   *
   * <p>Calls to {@code peek()} should not change the state of the iteration, except that it

import static java.util.Objects.requireNonNull;

/**
 * The CLI "new-gen".
 *
 * @param <O> the options type
 * @param <R> the request type
 */
public abstract class ClingSupport<O extends Options, R extends InvokerRequest<O>> {
    static final String CORE_CLASS_REALM_ID = "plexus.core";

    protected final ClassWorld classWorld;
    protected final boolean classWorldManaged;

    /**

import java.util.concurrent.TimeUnit;
import junit.framework.TestCase;

/**
 * Tests for {@link AbstractListeningExecutorService}.
 *
 * @author Colin Decker
 */
public class AbstractListeningExecutorServiceTest extends TestCase {

  public void testSubmit() throws Exception {
    /*
     * Mostly just tests that TrustedListenableFutureTask are created and run; tests for

 *
 * @author Louis Wasserman
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface TestListMultimapGenerator<K extends @Nullable Object, V extends @Nullable Object>

@ElementTypesAreNonnullByDefault
public final class TreeRangeMap<K extends Comparable, V> implements RangeMap<K, V> {

  private final NavigableMap<Cut<K>, RangeMapEntry<K, V>> entriesByLowerBound;

  public static <K extends Comparable, V> TreeRangeMap<K, V> create() {
    return new TreeRangeMap<>();
  }

  @SuppressWarnings("unchecked")
  public static <K extends Comparable<?>, V> TreeRangeMap<K, V> copyOf(

@GwtIncompatible
public abstract class AbstractCollectionTestSuiteBuilder<
        B extends AbstractCollectionTestSuiteBuilder<B, E>, E>
    extends PerCollectionSizeTestSuiteBuilder<B, TestCollectionGenerator<E>, Collection<E>, E> {
  @SuppressWarnings("rawtypes") // class literals
  @Override
  protected List<Class<? extends AbstractTester>> getTesters() {
    return Arrays.<Class<? extends AbstractTester>>asList(
        CollectionAddAllTester.class,

@GwtIncompatible
public class SortedSetTestSuiteBuilder<E> extends SetTestSuiteBuilder<E> {
  public static <E> SortedSetTestSuiteBuilder<E> using(TestSortedSetGenerator<E> generator) {
    SortedSetTestSuiteBuilder<E> builder = new SortedSetTestSuiteBuilder<>();
    builder.usingGenerator(generator);
    return builder;
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override
  protected List<Class<? extends AbstractTester>> getTesters() {

@GwtIncompatible
public class SortedSetTestSuiteBuilder<E> extends SetTestSuiteBuilder<E> {
  public static <E> SortedSetTestSuiteBuilder<E> using(TestSortedSetGenerator<E> generator) {
    SortedSetTestSuiteBuilder<E> builder = new SortedSetTestSuiteBuilder<>();
    builder.usingGenerator(generator);
    return builder;
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override
  protected List<Class<? extends AbstractTester>> getTesters() {

/**
 * Creates maps, containing sample elements, to be tested.
 *
 * @author George van den Driessche
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface TestMapGenerator<K extends @Nullable Object, V extends @Nullable Object>
    extends TestContainerGenerator<Map<K, V>, Map.Entry<K, V>> {
  K[] createKeyArray(int length);

  V[] createValueArray(int length);

 *
 * @author Louis Wasserman
 */
@GwtIncompatible // not worth using in GWT for now
@ElementTypesAreNonnullByDefault
class CompactLinkedHashSet<E extends @Nullable Object> extends CompactHashSet<E> {

  /** Creates an empty {@code CompactLinkedHashSet} instance. */
  public static <E extends @Nullable Object> CompactLinkedHashSet<E> create() {
    return new CompactLinkedHashSet<>();
  }

  /**