*
   * @return the count of {@code element} in the multiset before this call
   * @throws IllegalArgumentException if {@code count} is negative
   */
  @CanIgnoreReturnValue
  @Override
  public int setCount(E element, int count) {
    checkNotNull(element);
    checkNonnegative(count, "count");
    while (true) {
      AtomicInteger existingCounter = Maps.safeGet(countMap, element);
      if (existingCounter == null) {

   *
   * @return the count of {@code element} in the multiset before this call
   * @throws IllegalArgumentException if {@code count} is negative
   */
  @CanIgnoreReturnValue
  @Override
  public int setCount(E element, int count) {
    checkNotNull(element);
    checkNonnegative(count, "count");
    while (true) {
      AtomicInteger existingCounter = Maps.safeGet(countMap, element);
      if (existingCounter == null) {

     *
     * @return the count of {@code element} in the multiset before this call
     * @throws IllegalArgumentException if {@code count} is negative
     */
    @Override
    public int setCount(E element, int count) {
      checkNonnegative(count, "count");
      return (count == 0) ? removeAllOccurrences(element) : unbox(countMap.put(element, count));
    }

    /**

  public final boolean setCount(E element, int oldCount, int newCount) {
    throw new UnsupportedOperationException();
  }

  @GwtIncompatible // not present in emulated superclass
  @Override
  int copyIntoArray(@Nullable Object[] dst, int offset) {
    for (Multiset.Entry<E> entry : entrySet()) {
      Arrays.fill(dst, offset, offset + entry.getCount(), entry.getElement());
      offset += entry.getCount();

    when(backingMap.remove(KEY, current)).thenReturn(true);

    assertEquals(countToRemove, multiset.setCount(KEY, 0));
    assertEquals(0, current.get());
  }

  public void testSetCount_0_nonePresent() {
    when(backingMap.get(KEY)).thenReturn(null);

    assertEquals(0, multiset.setCount(KEY, 0));
  }

  public void testCreate() {

      }
    }

    @Override
    public int setCount(@ParametricNullness E element, int count) {
      synchronized (mutex) {
        return delegate().setCount(element, count);
      }
    }

    @Override
    public boolean setCount(@ParametricNullness E element, int oldCount, int newCount) {
      synchronized (mutex) {
        return delegate().setCount(element, oldCount, newCount);
      }
    }

    assertEquals(
        "multiset.setCount() should return the old count",
        getMultiset().count(element),
        setCount(element, count));
  }

  @Override
  void setCountNoCheckReturnValue(E element, int count) {
    setCount(element, count);
  }

  @CanIgnoreReturnValue
  private int setCount(E element, int count) {
    return getMultiset().setCount(element, count);
  }

    } else {
      counts[index] = oldCount - occurrences;
      size -= occurrences;
    }
    return oldCount;
  }

  // Modification Operations
  @CanIgnoreReturnValue
  @Override
  public int setCount(E element, int count) {
    checkIsE(element);
    checkNonnegative(count, "count");
    int index = element.ordinal();
    int oldCount = counts[index];
    counts[index] = count;
    size += count - oldCount;

    assertEquals(0, multiset.remove(entry.getElement(), entry.getCount()));
    assertFalse(multiset.remove(entry.getElement()));
    assertFalse(multiset.elementSet().remove(entry.getElement()));
  }

  void expectSetCountFailure(SortedMultiset<E> multiset, Entry<E> entry) {
    try {
      multiset.setCount(entry.getElement(), multiset.count(entry.getElement()));

    @Override
    public int hashCode() {
      return standardHashCode();
    }

    @Override
    public boolean setCount(T element, int oldCount, int newCount) {
      return standardSetCount(element, oldCount, newCount);
    }

    @Override
    public int setCount(T element, int count) {
      return standardSetCount(element, count);
    }

    @Override
    public Set<T> elementSet() {