*     been modified, but not always: in the case that {@code expectedOldCount == newCount}, the
   *     method will return {@code true} if the condition was met.
   * @throws IllegalArgumentException if {@code expectedOldCount} or {@code newCount} is negative
   */
  @CanIgnoreReturnValue
  @Override
  public boolean setCount(E element, int expectedOldCount, int newCount) {