* forward to this implementation.
   *
   * @since 7.0
   */
  protected int standardSetCount(@ParametricNullness E element, int count) {
    return Multisets.setCountImpl(this, element, count);
  }

  /**
   * A sensible definition of {@link #setCount(Object, int, int)} in terms of {@link #count(Object)}

   * forward to this implementation.
   *
   * @since 7.0
   */
  protected int standardSetCount(@ParametricNullness E element, int count) {
    return Multisets.setCountImpl(this, element, count);
  }

  /**
   * A sensible definition of {@link #setCount(Object, int, int)} in terms of {@link #count(Object)}

            : elementsToRetain;

    return self.elementSet().retainAll(collection);
  }

  /** An implementation of {@link Multiset#setCount(Object, int)}. */
  static <E extends @Nullable Object> int setCountImpl(
      Multiset<E> self, @ParametricNullness E element, int count) {
    checkNonnegative(count, "count");

    int oldCount = self.count(element);

    int delta = count - oldCount;
    if (delta > 0) {

            : elementsToRetain;

    return self.elementSet().retainAll(collection);
  }

  /** An implementation of {@link Multiset#setCount(Object, int)}. */
  static <E extends @Nullable Object> int setCountImpl(
      Multiset<E> self, @ParametricNullness E element, int count) {
    checkNonnegative(count, "count");

    int oldCount = self.count(element);

    int delta = count - oldCount;
    if (delta > 0) {