this.forceCopy = true;
      return result;
    }
  }

  int unsafeCompare(Object a, @Nullable Object b) {
    return unsafeCompare(comparator, a, b);
  }

  static int unsafeCompare(Comparator<?> comparator, Object a, @Nullable Object b) {
    // Pretend the comparator can compare anything. If it turns out it can't