/** Adds the given pair of values to the dataset. */
  public void add(double x, double y) {
    // We extend the recursive expression for the one-variable case at Art of Computer Programming
    // vol. 2, Knuth, 4.2.2, (16) to the two-variable case. We have two value series x_i and y_i.
    // We define the arithmetic means X_n = 1/n \sum_{i=1}^n x_i, and Y_n = 1/n \sum_{i=1}^n y_i.

        int di = 0;
        for (;;) {
            /* NTLM HTTP Authentication must be re-negotiated
             * with challenge from 'server' to access DFS vol. */
            dr.resolveHashes = auth.hashesExternal;
            dr.ttl = resp.referrals[di].ttl;
            dr.expiration = expiration;
            if (path.equals("")) {

	}
	defer done(0, &err)

	return p.storage.ListVols(ctx)
}

func (p *xlStorageDiskIDCheck) StatVol(ctx context.Context, volume string) (vol VolInfo, err error) {
	ctx, done, err := p.TrackDiskHealth(ctx, storageMetricStatVol, volume)
	if err != nil {
		return vol, err
	}
	defer done(0, &err)

      max = value;
      if (!isFinite(value)) {
        sumOfSquaresOfDeltas = NaN;
      }
    } else {
      count++;
      if (isFinite(value) && isFinite(mean)) {
        // Art of Computer Programming vol. 2, Knuth, 4.2.2, (15) and (16)
        double delta = value - mean;
        mean += delta / count;
        sumOfSquaresOfDeltas += delta * (value - mean);
      } else {
        mean = calculateNewMeanNonFinite(mean, value);

Mas ao mesmo tempo, funções definidas com `async def` têm que ser "aguardadas". Então, funções com `async def` podem ser chamadas somente dentro de funções definidas com `async def` também.

Então, sobre o ovo e a galinha, como você chama a primeira função async?

type SRBucketDeleteOp string

const (
	// MarkDelete creates .minio.sys/buckets/.deleted/<bucket> vol entry to hold onto deleted bucket's state
	// until peers are synced in site replication setup.
	MarkDelete SRBucketDeleteOp = "MarkDelete"

	// Purge deletes the .minio.sys/buckets/.deleted/<bucket> vol entry
	Purge SRBucketDeleteOp = "Purge"
	// NoOp no action needed
	NoOp SRBucketDeleteOp = "NoOp"
)

		}
		volsInfo = append(volsInfo, VolInfo{
			Name: pathutil.Clean(entry),
		})
	}
	return volsInfo, nil
}

// StatVol - get volume info.
func (s *xlStorage) StatVol(ctx context.Context, volume string) (vol VolInfo, err error) {
	// Verify if volume is valid and it exists.
	volumeDir, err := s.getVolDir(volume)
	if err != nil {
		return VolInfo{}, err
	}

	// Stat a volume entry.
	var st os.FileInfo

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