public abstract void clear();

  // Views

  @LazyInit private transient @Nullable Set<E> elementSet;

  @Override
  public Set<E> elementSet() {
    Set<E> result = elementSet;
    if (result == null) {
      elementSet = result = createElementSet();
    }
    return result;
  }

  /**
   * Creates a new instance of this multiset's element set, which will be returned by {@link
   * #elementSet()}.

        assertEquals(rootCause, finalException.getCause().getCause());
    }

    @Test
    @DisplayName("Should handle null message gracefully")
    void testNullMessage() {
        // When/Then
        assertDoesNotThrow(() -> {
            SmbException exception = new SmbException((String) null);
            assertNotNull(exception);
        });
    }

    @Test

    this.subjectToCaCerts = map
  }

  override fun findByIssuerAndSignature(cert: X509Certificate): X509Certificate? {
    val issuer = cert.issuerX500Principal
    val subjectCaCerts = subjectToCaCerts[issuer] ?: return null

    return subjectCaCerts.firstOrNull {
      try {
        cert.verify(it.publicKey)
        return@firstOrNull true
      } catch (_: Exception) {
        return@firstOrNull false
      }
    }
  }

  }

  @Test
  fun selectedProtocolIsNullWhenSslSocketThrowsExceptionForApplicationProtocol() {
    platform.assumeJdk9()
    val applicationProtocolUnsupported =
      object : DelegatingSSLSocket(null) {
        override fun getApplicationProtocol(): String = throw UnsupportedOperationException("Mock exception")
      }
    assertThat(Jdk9Platform().getSelectedProtocol(applicationProtocolUnsupported)).isNull()
  }

/**
 * ManagedVersionMap
 */
@Deprecated
public class ManagedVersionMap extends HashMap<String, Artifact> {
    public ManagedVersionMap(Map<String, Artifact> map) {
        super();
        if (map != null) {
            putAll(map);
        }
    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder("ManagedVersionMap (" + size() + " entries)\n");

        Model model = Model.newBuilder()
                .groupId("group")
                .location("groupId", InputLocation.of(InputSource.of("model", null)))
                .build();
        StringSearchModelInterpolator interpolator = new StringSearchModelInterpolator();
        interpolator.initialize();

 */
class ContributorTest {

    @Test
    void testHashCodeNullSafe() {
        new Contributor().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Contributor().equals(null));

        new Contributor().equals(new Contributor());
    }

    @Test
    void testEqualsIdentity() {
        Contributor thing = new Contributor();

 *
 */
class ExtensionTest {

    @Test
    void testHashCodeNullSafe() {
        new Extension().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Extension().equals(null));

        new Extension().equals(new Extension());
    }

    @Test
    void testEqualsIdentity() {
        Extension thing = new Extension();

class PluginContainerTest {

    @Test
    void testHashCodeNullSafe() {
        new PluginContainer().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new PluginContainer().equals(null));

        new PluginContainer().equals(new PluginContainer());
    }

    @Test
    void testEqualsIdentity() {
        PluginContainer thing = new PluginContainer();

 */
class RelocationTest {

    @Test
    void testHashCodeNullSafe() {
        new Relocation().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Relocation().equals(null));

        new Relocation().equals(new Relocation());
    }

    @Test
    void testEqualsIdentity() {
        Relocation thing = new Relocation();