### Your task

Translate an English text – the original content – to a target language.

The original content is written in Markdown, write the translation in Markdown as well.

The original content will be surrounded by triple percentage signs («%%%»). Do not include the triple percentage signs in the translation.

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(ALLOWS_NULL_KEYS)
  public void testEqualsMultimapWithNullKey() {
    Multimap<K, V> original = multimap();
    initMultimapWithNullKey();
    Multimap<K, V> withNull = multimap();
    new EqualsTester()
        .addEqualityGroup(original)
        .addEqualityGroup(
            withNull, getSubjectGenerator().create((Object[]) createArrayWithNullKey()))
        .testEquals();
  }

/**
 */
class DefaultMavenExecutionTest {
    @Test
    void testCopyDefault() {
        MavenExecutionRequest original = new DefaultMavenExecutionRequest();
        MavenExecutionRequest copy = DefaultMavenExecutionRequest.copy(original);
        assertNotNull(copy);
        assertNotSame(copy, original);
    }

    @Test
    void testResultWithNullTopologicallySortedProjectsIsEmptyList() {

  }

  private static final class BiMapPair<K, V> implements Serializable {
    final BiMap<K, V> forward;
    final BiMap<V, K> backward;

    BiMapPair(BiMap<K, V> original) {
      this.forward = original;
      this.backward = original.inverse();
    }

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

  /**

        .plus(Integer::class, 5 as Integer)
    assertThat(tags[String::class]).isEqualTo("hello")
    assertThat(tags[Integer::class]).isEqualTo(5)
  }

  /** The implementation retains no nodes from the original linked list. */
  @Test
  fun replaceFirstElement() {
    val tags =
      EmptyTags
        .plus(String::class, "a")
        .plus(Integer::class, 5 as Integer)
        .plus(Boolean::class, true)

private
data class MappedApiFunctionParameter(
    val original: ApiFunctionParameter,
    val index: Int = original.index,
    val type: ApiTypeUsage = original.type,
    val isVarargs: Boolean = original.isVarargs,
    val asArgument: String = "${if (original.isVarargs) "*" else ""}`${original.name ?: "p$index"}`"
) {
    val name: String
        get() = original.name ?: "p$index"
}


private

    Set<Object> original = ImmutableSet.of(new Object(), new Object());

    assertThrows(ClassCastException.class, () -> ImmutableSortedSet.copyOf(original));
  }

  public void testImmutableSortedSetCopyOfIterator() {
    // false positive: `new Object()` is not equal to `new Object()`
    @SuppressWarnings("DistinctVarargsChecker")
    Set<Object> original = ImmutableSet.of(new Object(), new Object());

    Set<Object> original = ImmutableSet.of(new Object(), new Object());

    assertThrows(ClassCastException.class, () -> ImmutableSortedSet.copyOf(original));
  }

  public void testImmutableSortedSetCopyOfIterator() {
    // false positive: `new Object()` is not equal to `new Object()`
    @SuppressWarnings("DistinctVarargsChecker")
    Set<Object> original = ImmutableSet.of(new Object(), new Object());

        NtlmPasswordAuthenticator original = new NtlmPasswordAuthenticator("DOMAIN", "testuser", testPassword);

        NtlmPasswordAuthenticator cloned = original.clone();

        // Verify cloned values
        assertEquals(original.getUserDomain(), cloned.getUserDomain());
        assertEquals(original.getUsername(), cloned.getUsername());
        assertEquals(original.getPassword(), cloned.getPassword());

     *
     * @param original the original exception
     * @param attemptNumber the current attempt number
     * @return new exception with updated attempt information
     */
    public static SmbOperationException forRetry(SmbOperationException original, int attemptNumber) {
        SmbOperationException retry = new SmbOperationException(original.errorCode, original.originalMessage, original.getCause(),