import java.util.Locale;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for {@link Service} */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class ServiceTest extends TestCase {

  /** Assert on the comparison ordering of the State enum since we guarantee it. */
  public void testStateOrdering() {
    // List every valid (direct) state transition.
    assertLessThan(NEW, STARTING);

import com.google.common.annotations.J2ktIncompatible;
import java.io.Serializable;
import java.util.Iterator;
import org.jspecify.annotations.Nullable;

@GwtCompatible
final class PairwiseEquivalence<E, T extends @Nullable E> extends Equivalence<Iterable<T>>
    implements Serializable {
  final Equivalence<E> elementEquivalence;

  PairwiseEquivalence(Equivalence<E> elementEquivalence) {

    assertThat(future.set(1)).isTrue();
    assertSuccessful(future, 1);
  }

  /** Concrete subclass for testing. */
  private static class TestedFuture<V extends @Nullable Object> extends AbstractFuture<V> {
    private static <V extends @Nullable Object> TestedFuture<V> create() {
      return new TestedFuture<V>();
    }
  }

  private static final class CountingRunnable implements Runnable {
    int count;

import org.lastaflute.web.validation.Required;

/**
 * Base class for dictionary search request body objects in admin API.
 * Extends BaseSearchBody with dictionary-specific parameters.
 */
public class BaseSearchDictBody extends BaseSearchBody {
    /** The dictionary ID for the search operation. */
    @Required
    public String dictId;

    /**

/**
 * Request body class for protected words dictionary edit operations in the admin REST API.
 * This class extends EditForm to inherit the necessary form validation and binding capabilities
 * for protected words dictionary management operations.
 */
public class EditBody extends EditForm {

    /**
     * Default constructor.
     */
    public EditBody() {
        super();
    }

/**
 * Request body class for stemmer override dictionary edit operations in the admin REST API.
 * This class extends EditForm to inherit the necessary form validation and binding capabilities
 * for stemmer override dictionary management operations.
 */
public class EditBody extends EditForm {

    /**
     * Default constructor.
     */
    public EditBody() {
        super();
    }

import org.codelibs.fess.app.web.api.admin.BaseSearchBody;

/**
 * Search request body for duplicate host administration.
 * Extends BaseSearchBody with duplicate host-specific search parameters.
 */
public class SearchBody extends BaseSearchBody {

    /** The regular host name to search for. */
    public String regularName;

    /** The duplicate host name to search for. */

/**
 * Creates multisets, containing sample elements, to be tested.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public interface TestMultisetGenerator<E extends @Nullable Object>
    extends TestCollectionGenerator<E> {
  @Override
  Multiset<E> create(Object... elements);

Here’s a [sample event listener](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEventsNonConcurrent.java) that prints each event with a timestamp.

```java
class PrintingEventListener extends EventListener {
  private long callStartNanos;

  private void printEvent(String name) {
    long nowNanos = System.nanoTime();
    if (name.equals("callStart")) {
      callStartNanos = nowNanos;
    }

        Proxy.newProxyInstance(
            interfaceType.getClassLoader(), new Class<?>[] {interfaceType}, handler);
    return interfaceType.cast(object);
  }

  @ParametricNullness
  private <T extends @Nullable Object> T callWithTimeout(
      Callable<T> callable, long timeoutDuration, TimeUnit timeoutUnit, boolean amInterruptible)
      throws Exception {
    checkNotNull(callable);
    checkNotNull(timeoutUnit);