List<E> setContents = new ArrayList<>();
    for (E e : contents) {
      if (!setContents.contains(e)) {
        setContents.add(e);
      }
    }
    return new MinimalSet<>(type, setContents.toArray(emptyArrayForContents));
  }

  private MinimalSet(Class<? super @NonNull E> type, E... contents) {
    super(type, true, contents);
  }

  /*
   * equals() and hashCode() are more specific in the Set contract.

    static SerializedForm create(
        ImmutableTable<?, ?, ?> table, int[] cellRowIndices, int[] cellColumnIndices) {
      return new SerializedForm(
          table.rowKeySet().toArray(),
          table.columnKeySet().toArray(),
          table.values().toArray(),
          cellRowIndices,
          cellColumnIndices);
    }

    Object readResolve() {
      if (cellValues.length == 0) {
        return of();
      }

  public static <T extends @Nullable Object> T[] toArray(
      Iterable<? extends T> iterable, Class<@NonNull T> type) {
    return toArray(iterable, ObjectArrays.newArray(type, 0));
  }

  static <T extends @Nullable Object> T[] toArray(Iterable<? extends T> iterable, T[] array) {
    Collection<? extends T> collection = castOrCopyToCollection(iterable);
    return collection.toArray(array);
  }

  /**

  public void testKeySet_nullToArray() {
    for (LoadingCache<Object, Object> cache : caches()) {
      Set<Object> keys = cache.asMap().keySet();
      assertThrows(NullPointerException.class, () -> keys.toArray((Object[]) null));
      checkEmpty(cache);
    }
  }

  public void testKeySet_addNotSupported() {
    for (LoadingCache<Object, Object> cache : caches()) {

  public void testKeySet_nullToArray() {
    for (LoadingCache<Object, Object> cache : caches()) {
      Set<Object> keys = cache.asMap().keySet();
      assertThrows(NullPointerException.class, () -> keys.toArray((Object[]) null));
      checkEmpty(cache);
    }
  }

  public void testKeySet_addNotSupported() {
    for (LoadingCache<Object, Object> cache : caches()) {

    @Override
    public @Nullable Object[] toArray() {
      synchronized (mutex) {
        return delegate().toArray();
      }
    }

    @Override
    @SuppressWarnings("nullness") // b/192354773 in our checker affects toArray declarations
    public <T extends @Nullable Object> T[] toArray(T[] a) {
      synchronized (mutex) {
        return delegate().toArray(a);
      }
    }

    @Override
    public @Nullable Object[] toArray() {
      synchronized (mutex) {
        return delegate().toArray();
      }
    }

    @Override
    @SuppressWarnings("nullness") // b/192354773 in our checker affects toArray declarations
    public <T extends @Nullable Object> T[] toArray(T[] a) {
      synchronized (mutex) {
        return delegate().toArray(a);
      }
    }

        }

        int cleanedSz = cleaned.size();

        String[] cleanArgs;

        if (cleanedSz == 0) {
            cleanArgs = args;
        } else {
            cleanArgs = cleaned.toArray(new String[0]);
        }

        return cleanArgs;
    }

    return generator.createArray(length);
  }

  @Override
  public T createTestSubject() {
    Collection<E> elements = getSampleElements(getCollectionSize().getNumElements());
    return generator.create(elements.toArray());
  }

  @Override
  public Collection<E> getSampleElements(int howMany) {
    SampleElements<E> samples = samples();
    List<E> allSampleElements =

  protected E[] createSamplesArray() {
    E[] array = getSubjectGenerator().createArray(getNumElements());
    getSampleElements().toArray(array);
    return array;
  }

  protected E[] createOrderedArray() {
    E[] array = getSubjectGenerator().createArray(getNumElements());
    getOrderedElements().toArray(array);
    return array;
  }

  public static class ArrayWithDuplicate<E extends @Nullable Object> {