private static final Executor defaultAdapterExecutor = newCachedThreadPool(threadFactory);

    private final Executor adapterExecutor;

    // The execution list to hold our listeners.
    private final ExecutionList executionList = new ExecutionList();

    // This allows us to only start up a thread waiting on the delegate future when the first
    // listener is added.

 * factory method to construct instances can have their instance methods checked. For example:
 *
 * <pre>
 * public class Address {
 *   private final String city;
 *   private final String state;
 *   private final String zipcode;
 *
 *   public Address(String city, String state, String zipcode) {...}
 *
 *   {@literal @Override} public boolean equals(Object obj) {...}

    private final SearchModule searchModule = new SearchModule(Settings.EMPTY, List.of());
    private final ClusterSettings clusterSettings = new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS);
    private final PageCacheRecycler recycler = new PageCacheRecycler(Settings.EMPTY);
    private final Index index = new Index("test", "uuid");

        validator = new CronExpressionValidator();
    }

    @Test
    public void test_isValid_nullValue() {
        final ConstraintValidatorContext context = null;
        assertTrue(validator.isValid(null, context));
    }

    @Test
    public void test_isValid_blankValue() {
        final ConstraintValidatorContext context = null;
        assertTrue(validator.isValid(" ", context));

/**
 * Represents a method or constructor parameter.
 *
 * @author Ben Yu
 * @since 14.0
 */
public final class Parameter implements AnnotatedElement {

  private final Invokable<?, ?> declaration;
  private final int position;
  private final TypeToken<?> type;
  private final ImmutableList<Annotation> annotations;

  /**

    return MinimalCollection.of();
  }

  protected final E e0() {
    return samples.e0();
  }

  protected final E e1() {
    return samples.e1();
  }

  protected final E e2() {
    return samples.e2();
  }

  protected final E e3() {
    return samples.e3();
  }

  protected final E e4() {
    return samples.e4();
  }

 * search, display, and navigation through related query results.
 */
public class RelatedQueryPager implements Serializable {
    private static final long serialVersionUID = 1L;

    /**
     * Default current page number for pagination.
     */
    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    /**
     * Total number of records in the result set.
     */
    private int allRecordCount;

    /**

 */
@Deprecated(since = "4.0.0")
public final class Maven4ScopeManagerConfiguration implements ScopeManagerConfiguration {
    public static final Maven4ScopeManagerConfiguration INSTANCE = new Maven4ScopeManagerConfiguration();

    public static final String RS_NONE = "none";
    public static final String RS_MAIN_COMPILE = "main-compile";
    public static final String RS_MAIN_COMPILE_PLUS_RUNTIME = "main-compilePlusRuntime";

 * @param <N> Node parameter type
 * @param <V> Value parameter type
 */
class StandardValueGraph<N, V> extends AbstractValueGraph<N, V> {
  private final boolean isDirected;
  private final boolean allowsSelfLoops;
  private final ElementOrder<N> nodeOrder;

  final MapIteratorCache<N, GraphConnections<N, V>> nodeConnections;

  long edgeCount; // must be updated when edges are added or removed

@GwtIncompatible
final class RegularImmutableSortedMultiset<E> extends ImmutableSortedMultiset<E> {
  private static final long[] zeroCumulativeCounts = {0};

  static final ImmutableSortedMultiset<?> NATURAL_EMPTY_MULTISET =
      new RegularImmutableSortedMultiset<>(Ordering.natural());

  @VisibleForTesting final transient RegularImmutableSortedSet<E> elementSet;
  private final transient long[] cumulativeCounts;