@GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    new NullPointerTester().testAllPublicStaticMethods(Maps.class);
  }

  private static final Map<Integer, Integer> EMPTY = emptyMap();
  private static final Map<Integer, Integer> SINGLETON = singletonMap(1, 2);

  public void testMapDifferenceEmptyEmpty() {
    MapDifference<Integer, Integer> diff = Maps.difference(EMPTY, EMPTY);

 * when there is a specific reason to prioritize memory over CPU.
 *
 * @author Louis Wasserman
 */
@GwtIncompatible // not worth using in GWT for now
final class CompactLinkedHashSet<E extends @Nullable Object> extends CompactHashSet<E> {

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

 * when there is a specific reason to prioritize memory over CPU.
 *
 * @author Louis Wasserman
 */
@GwtIncompatible // not worth using in GWT for now
final class CompactLinkedHashSet<E extends @Nullable Object> extends CompactHashSet<E> {

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

/**
 * Tests {@link SequentialExecutor}.
 *
 * @author JJ Furman
 */
@NullUnmarked
public class SequentialExecutorTest extends TestCase {

  private static class FakeExecutor implements Executor {
    final Queue<Runnable> tasks = new ArrayDeque<>();

    @Override
    public void execute(Runnable command) {
      tasks.add(command);
    }

    boolean hasNext() {
      return !tasks.isEmpty();
    }

 * - Interaction check that passed options are not mutated.
 */
@ExtendWith(MockitoExtension.class)
class StaticJAASConfigurationTest {

    // Constants used in assertions
    private static final String EXPECTED_LOGIN_MODULE = "com.sun.security.auth.module.Krb5LoginModule";

    @Test
    @DisplayName("Default constructor yields REQUIRED Krb5 entry with empty options")

        // Test another flag
        m.setFlag(FLAG_B);
        assertTrue(m.isFlagSet(FLAG_B));
        m.unsetFlag(FLAG_B);
        assertFalse(m.isFlagSet(FLAG_B));
    }

    private static final class ResultMsg extends TestMessage {
        void setResult(int r) {
            this.result = r;
        }
    }

    @Test
    void testGetResult() {
        ResultMsg m = new ResultMsg();

 * {@link org.apache.maven.project.MavenProjectHelper#attachArtifact} instead.
 */
@Deprecated
public class AttachedArtifact extends DefaultArtifact {

    private final Artifact parent;

    public AttachedArtifact(Artifact parent, String type, String classifier, ArtifactHandler artifactHandler) {
        super(
                parent.getGroupId(),
                parent.getArtifactId(),

/**
 * Assists in populating an execution request for invocation of Maven.
 */
@Named
@Singleton
public class DefaultMavenExecutionRequestPopulator implements MavenExecutionRequestPopulator {

    private final MavenRepositorySystem repositorySystem;

    @Inject
    public DefaultMavenExecutionRequestPopulator(MavenRepositorySystem repositorySystem) {
        this.repositorySystem = repositorySystem;
    }

    @Override

import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Locale;

public class GradleKotlinDslReferencePlugin implements Plugin<Project> {

    private static final String TASK_NAME = "dokkaGeneratePublicationHtml";

    @Override
    public void apply(Project project) {

import jcifs.smb.SID;
import jcifs.smb.SmbException;

/**
 * Tests for the SID class.
 */
class SIDTest {

    // A well-known SID for "Administrators"
    private final String adminSidString = "S-1-5-32-544";
    private final byte[] adminSidBytes = new byte[] { 1, 2, 0, 0, 0, 0, 0, 5, 32, 0, 0, 0, 32, 2, 0, 0 };

    /**
     * Test constructor with a valid SID string.
     *