then:
        tree.getTransitiveChildClassIds(168) == [159, 163, 167, 51, 103, 155, 12, 64, 116]
    }

    private static int amount(int count, int level) {
        if (level == 0) {
            return 0
        }
        Math.pow(count, level) + amount(count, level - 1)
    }

    public static ExponentialBackoff<Signal> of(int amount, TimeUnit unit) {
        return of(amount, unit, Signal.SLEEP);
    }

    public static <T extends Signal> ExponentialBackoff<T> of(int amount, TimeUnit unit, T signal) {
        return new ExponentialBackoff<T>((int) TimeUnit.MILLISECONDS.convert(amount, unit), signal, SLOT_TIME);
    }

    public static ExponentialBackoff<Signal> of(int amount, TimeUnit unit, int slotTime, TimeUnit slotTimeUnit) {

	// GetDiskFreeSpaceEx - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
	// Retrieves information about the amount of space that is available on a disk volume,
	// which is the total amount of space, the total amount of free space, and the total
	// amount of free space available to the user that is associated with the calling thread.
	GetDiskFreeSpaceEx = kernel32.NewProc("GetDiskFreeSpaceExW")

   * returns the expected data.
   *
   * @throws Throwable if the listener isn't called or if it resulted in a throwable or if the
   *     result doesn't match the expected value.
   */
  public void assertSuccess(Object expectedData) throws Throwable {
    // Verify that the listener executed in a reasonable amount of time.

import org.gradle.performance.measure.Amount
import org.gradle.performance.measure.Duration
import spock.lang.Specification

import static org.gradle.performance.results.PrettyCalculator.percentChange

class PrettyCalculatorSpec extends Specification {

    def "knows percentage change"() {
        expect:
        percentChange(Amount.valueOf(current, Duration.SECONDS), Amount.valueOf(previous, Duration.SECONDS)) == percent

		ub := amount.UnscaledBig()
		amount.SetUnscaledBig(ub.Mul(ub, numericSuffix))
	}

	// Cap at min/max bounds.
	sign := amount.Sign()
	if sign == -1 {
		amount.Neg(amount)
	}

	// This rounds non-zero values up to the minimum representable value, under the theory that
	// if you want some resources, you should get some resources, even if you asked for way too small

   * returns the expected data.
   *
   * @throws Throwable if the listener isn't called or if it resulted in a throwable or if the
   *     result doesn't match the expected value.
   */
  public void assertSuccess(Object expectedData) throws Throwable {
    // Verify that the listener executed in a reasonable amount of time.

    }

    public static String getFormattedDifference(DataSeries<Duration> baselineVersion, DataSeries<Duration> currentVersion) {
        Amount<Duration> base = baselineVersion.getMedian();
        Amount<Duration> current = currentVersion.getMedian();
        Amount<Duration> diff = current.minus(base);

        String sign = diff.getValue().doubleValue() > 0 ? "+" : "";

                .map((DataSeries<Duration> data) -> data.isEmpty() ? null : data)
                .collect(Collectors.toList());

            Amount<Duration> min = totalTimeMedianStream(experiments).min(Comparator.naturalOrder()).orElse(null);
            Amount<Duration> max = totalTimeMedianStream(experiments).max(Comparator.naturalOrder()).orElse(null);

            if (min != null && min.equals(max)) {

    }

    public static MemoryAmount of(String notation) {
        return new MemoryAmount(parseNotation(notation), notation);
    }

    /**
     * Parse memory amount notation.
     *
     * @return The parsed memory amount in bytes, {@literal -1} if the notation is {@literal null} or empty.
     * @throws IllegalArgumentException if the notation is invalid
     */