assertSame(map, ImmutableClassToInstanceMap.copyOf(map));
  }

  public void testCopyOf_map_nulls() {
    Map<Class<? extends Number>, Number> nullKey = singletonMap(null, (Number) 1.0);
    assertThrows(NullPointerException.class, () -> ImmutableClassToInstanceMap.copyOf(nullKey));

    Map<? extends Class<? extends Number>, Number> nullValue = singletonMap(Number.class, null);

    public void testAddInitialSettingsWithNullValue() {
        // Test adding null value
        builder.addInitialSettings("nullKey", null);
        assertEquals(1, builder.initialSettings.size());
        assertTrue(builder.initialSettings.containsKey("nullKey"));
        assertEquals(null, builder.initialSettings.get("nullKey"));
    }

    @Test
    public void testScrollTimeout() {
        // Test setting scroll timeout

      boolean permitsDuplicates,
      @Nullable String nullKey,
      @Nullable Integer nullValue) {
    multimap.clear();
    multimap.put("foo", 1);
    multimap.put("foo", 2);
    multimap.put("foo", 3);
    multimap.put("bar", 5);
    multimap.put("bar", -1);
    multimap.put(nullKey, nullValue);
    multimap.put("foo", nullValue);
    multimap.put(nullKey, 5);
    multimap.put("foo", 2);

        .testEquals();
  }

  public void testOfEntriesNull() {
    Entry<@Nullable Integer, @Nullable Integer> nullKey = entry(null, 23);
    assertThrows(
        NullPointerException.class,
        () -> ImmutableMap.ofEntries((Entry<Integer, Integer>) nullKey));
    Entry<@Nullable Integer, @Nullable Integer> nullValue = entry(23, null);
    assertThrows(
        NullPointerException.class,

            return nullify(metadata.getGroupId());
        }

        @Override
        public String getArtifactId() {
            return nullify(metadata.getArtifactId());
        }

        @Override
        public String getBaseVersion() {
            return nullify(metadata.getVersion());
        }

        private String nullify(String str) {

     */
    @Test
    @DisplayName("calling getters on null reference throws NPE")
    void testNullReference() {
        AllocInfo nullRef = null;
        assertThrows(NullPointerException.class, () -> nullRef.getCapacity());
        assertThrows(NullPointerException.class, () -> nullRef.getFree());
    }

          subArray.contains(expectedSubArray[i]));
    }
    assertNull(
        "The array element immediately following the end of the collection should be nulled",
        array[getNumElements()]);
    // array[getNumElements() + 1] might or might not have been nulled
  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testToArray_oversizedArray_ordered() {

        String path = "/share/file.txt";

        // Test full lease
        Smb2LeaseKey fullKey = leaseManager.requestLease(path + "1", Smb2LeaseState.SMB2_LEASE_FULL);
        leaseManager.updateLease(fullKey, Smb2LeaseState.SMB2_LEASE_FULL);
        LeaseEntry fullEntry = leaseManager.getLease(fullKey);

        assertTrue(fullEntry.hasReadCache());
        assertTrue(fullEntry.hasWriteCache());

 * of the public API. In particular, this class can be changed or deleted without prior notice.
 *
 */
public class RepositoryUtils {

    private static String nullify(String string) {
        return (string == null || string.isEmpty()) ? null : string;
    }

    public static org.apache.maven.artifact.Artifact toArtifact(Dependency dependency) {
        if (dependency == null) {

    Set<Feature<?>> inverseFeatures = new HashSet<>(mapFeatures);

    boolean nullKeys = inverseFeatures.remove(MapFeature.ALLOWS_NULL_KEYS);
    boolean nullValues = inverseFeatures.remove(MapFeature.ALLOWS_NULL_VALUES);

    if (nullKeys) {
      inverseFeatures.add(MapFeature.ALLOWS_NULL_VALUES);
    }
    if (nullValues) {