Se você quiser proteger sua API, há várias coisas melhores que você pode fazer, por exemplo:

import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code toString()} operations on a map. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *
 * @author Kevin Bourrillion
 * @author Louis Wasserman
 */
@GwtCompatible

import java.util.Iterator;
import java.util.Map.Entry;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code clear()} operations on a map. Can't be invoked directly;
 * please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *
 * @author George van den Driessche
 * @author Chris Povirk
 */
@GwtCompatible

      this.forward = original;
      this.backward = original.inverse();
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  /**
   * Returns {@link Method} instances for the tests that assume that the inverse will be the same
   * after serialization.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection

 *
 * @author Kevin Bourrillion
 * @author Jens Nyman
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class FakeTimeLimiter implements TimeLimiter {
  /** Creates a new {@link FakeTimeLimiter}. */
  public FakeTimeLimiter() {}

  @CanIgnoreReturnValue // TODO(kak): consider removing this
  @Override
  public <T> T newProxy(

 */
package org.codelibs.fess.suggest.request.popularwords;

import org.codelibs.fess.suggest.request.RequestBuilder;
import org.opensearch.transport.client.Client;

/**
 * Builder for creating a {@link PopularWordsRequest} to fetch popular words.
 * This builder provides methods to set various parameters for the request.
 */
public class PopularWordsRequestBuilder extends RequestBuilder<PopularWordsRequest, PopularWordsResponse> {

import java.util.List;

import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.rule.Rule;
import org.codelibs.fess.crawler.rule.RuleManager;

/**
 * Implementation of the {@link RuleManager} interface.
 * Manages a list of rules for the crawler.
 * Provides methods to add, remove, check, and retrieve rules.
 *
 */
public class RuleManagerImpl implements RuleManager {

import org.opensearch.transport.client.Client;

/**
 * Builder class for constructing SuggestSettings instances.
 */
public class SuggestSettingsBuilder {
    /**
     * Constructs a new {@link SuggestSettingsBuilder}.
     */
    public SuggestSettingsBuilder() {
        // nothing
    }

    /** The settings index name. */
    protected String settingsIndexName = "fess_suggest";

import java.util.concurrent.CancellationException;
import java.util.concurrent.Future;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for {@link Futures#getUnchecked(Future)}. */
@GwtCompatible
@NullUnmarked
public class FuturesGetUncheckedTest extends TestCase {
  public void testGetUnchecked_success() {
    assertEquals("foo", getUnchecked(immediateFuture("foo")));

import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicInteger;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link CacheLoader}.
 *
 * @author Charles Fry
 */
@NullUnmarked
public class CacheLoaderTest extends TestCase {

  private static class QueuingExecutor implements Executor {