@Nullable String[] array = new @Nullable String[] {null};
    assertThrows(NullPointerException.class, () -> ImmutableMultiset.copyOf((String[]) array));
  }

  public void testCopyOf_collection_empty() {
    // "<String>" is required to work around a javac 1.5 bug.
    Collection<String> c = MinimalCollection.<String>of();
    Multiset<String> multiset = ImmutableMultiset.copyOf(c);

    @Nullable String[] array = new @Nullable String[] {null};
    assertThrows(NullPointerException.class, () -> ImmutableMultiset.copyOf((String[]) array));
  }

  public void testCopyOf_collection_empty() {
    // "<String>" is required to work around a javac 1.5 bug.
    Collection<String> c = MinimalCollection.<String>of();
    Multiset<String> multiset = ImmutableMultiset.copyOf(c);

    ImmutableDoubleArray iia = ImmutableDoubleArray.copyOf((Iterable<Double>) list);
    list.set(2, 2.0);
    assertThat(iia.asList()).containsExactly(0.0, 1.0, 3.0).inOrder();
  }

  public void testCopyOf_collection_empty() {
    Collection<Double> iterable = Collections.emptySet();
    assertThat(ImmutableDoubleArray.copyOf(iterable)).isSameInstanceAs(ImmutableDoubleArray.of());
  }

    @Nullable String[] array = new @Nullable String[] {null};
    assertThrows(NullPointerException.class, () -> ImmutableList.copyOf((String[]) array));
  }

  public void testCopyOf_collection_empty() {
    // "<String>" is required to work around a javac 1.5 bug.
    Collection<String> c = MinimalCollection.<String>of();
    List<String> list = ImmutableList.copyOf(c);
    assertEquals(emptyList(), list);

    @Nullable String[] array = new @Nullable String[] {null};
    assertThrows(NullPointerException.class, () -> ImmutableList.copyOf((String[]) array));
  }

  public void testCopyOf_collection_empty() {
    // "<String>" is required to work around a javac 1.5 bug.
    Collection<String> c = MinimalCollection.<String>of();
    List<String> list = ImmutableList.copyOf(c);
    assertEquals(emptyList(), list);

    ImmutableIntArray iia = ImmutableIntArray.copyOf((Iterable<Integer>) list);
    list.set(2, 2);
    assertThat(iia.asList()).containsExactly(0, 1, 3).inOrder();
  }

  public void testCopyOf_collection_empty() {
    Collection<Integer> iterable = Collections.emptySet();
    assertThat(ImmutableIntArray.copyOf(iterable)).isSameInstanceAs(ImmutableIntArray.of());
  }

  public void testCopyOf_collection_nonempty() {

    ImmutableDoubleArray iia = ImmutableDoubleArray.copyOf((Iterable<Double>) list);
    list.set(2, 2.0);
    assertThat(iia.asList()).containsExactly(0.0, 1.0, 3.0).inOrder();
  }

  public void testCopyOf_collection_empty() {
    Collection<Double> iterable = Collections.emptySet();
    assertThat(ImmutableDoubleArray.copyOf(iterable)).isSameInstanceAs(ImmutableDoubleArray.of());
  }

  public void testCreation_arrayContainingOnlyNull() {
    String[] array = new String[] {null};
    assertThrows(NullPointerException.class, () -> ImmutableSortedMultiset.copyOf(array));
  }

  public void testCopyOf_collection_empty() {
    // "<String>" is required to work around a javac 1.5 bug.
    Collection<String> c = MinimalCollection.<String>of();
    Multiset<String> multiset = ImmutableSortedMultiset.copyOf(c);

    @Nullable String[] array = new @Nullable String[] {null};
    assertThrows(NullPointerException.class, () -> copyOf((String[]) array));
  }

  public void testCopyOf_collection_empty() {
    // "<String>" is required to work around a javac 1.5 bug.
    Collection<String> c = MinimalCollection.<String>of();
    Set<String> set = copyOf(c);
    assertEquals(Collections.<String>emptySet(), set);