}

  public void testAddAllPrimitiveIntStream() {
    StatsAccumulator accumulator = new StatsAccumulator();
    accumulator.addAll(megaPrimitiveDoubleStreamPart1().mapToInt(x -> (int) x));
    accumulator.addAll(megaPrimitiveDoubleStreamPart2().mapToInt(x -> (int) x));
    assertThat(accumulator.count()).isEqualTo(MEGA_STREAM_COUNT);
    assertThat(accumulator.mean()).isWithin(ALLOWED_ERROR * MEGA_STREAM_COUNT).of(MEGA_STREAM_MEAN);

 *   <li>Can be queried without allocating garbage.
 *   <li>Access to {@code IntStream} features (like {@link IntStream#sum}) using {@code stream()}
 *       instead of the awkward {@code stream().mapToInt(v -> v)}.
 * </ul>
 *
 * <p>Disadvantages compared to {@code ImmutableList<Integer>}:
 *
 * <ul>
 *   <li>Can't be passed directly to methods that expect {@code Iterable}, {@code Collection}, or

        if (spaceChars == null) {
            if (spaceStr.startsWith("u")) {
                spaceChars = split(spaceStr, "u")
                        .get(stream -> stream.filter(StringUtil::isNotBlank).mapToInt(s -> Integer.parseInt(s, 16)).toArray());
            } else {
                // backward compatibility
                final int length = spaceStr.length();
                spaceChars = new int[length];