volumeDir, err := s.getVolDir(volume)
	if err != nil {
		return err
	}

	discard := true

	var legacyJSON bool
	buf, _, err := s.readAllData(ctx, volume, volumeDir, pathJoin(volumeDir, path, xlStorageFormatFile), discard)
	if err != nil {
		if !errors.Is(err, errFileNotFound) {
			return err
		}

		s.RLock()
		legacy := s.formatLegacy

	cred, seedSignature, region, seedDate, errCode := calculateSeedSignature(req, trailer)
	if errCode != ErrNone {
		return nil, errCode
	}

	if trailer {
		// Discard anything unsigned.
		req.Trailer = make(http.Header)
		trailers := req.Header.Values(awsTrailerHeader)
		for _, key := range trailers {
			req.Trailer.Add(key, "")
		}
	} else {
		req.Trailer = nil
	}

	if len(users4) != 0 {
		t.Errorf("should find no user when searching with unexisting credit card, but got %v", len(users4))
	}

	var users5 []User

				foundPrefixes = append(foundPrefixes, result.Prefixes...)
				if !result.IsTruncated {
					break
				}
				marker = result.NextMarker
				if len(result.Objects) > 0 {
					// Discard marker, so it cannot resume listing.
					marker = result.Objects[len(result.Objects)-1].Name
				}
			}

			if len(testCase.result.Objects) != len(foundObjects) {

2700763,7732229,,2010-05-26 00:00:00,26,May,2010,113XX S HALSTED ST,1150,,CREDIT CARD FRAUD,,False,False,2233,22.0,34.0,,11,,,,41.688043288,-87.6422444,"(41.688043288, -87.6422444)"`

	testTable := []struct {
		name       string
		query      string
		requestXML []byte
		wantResult string
	}{

		n   int64
		err error
	}
	type justReader struct {
		io.Reader
	}
	type justWriter struct {
		io.Writer
	}
	discard := justWriter{io.Discard} // hide ReadFrom

	var with, withOut nErr
	with.n, with.err = io.Copy(discard, NewReader(nil))
	withOut.n, withOut.err = io.Copy(discard, justReader{NewReader(nil)})
	if with != withOut {
		t.Errorf("behavior differs: with = %#v; without: %#v", with, withOut)
	}
}

	Error(context.Context, string, ...interface{})
	Trace(ctx context.Context, begin time.Time, fc func() (sql string, rowsAffected int64), err error)
}

var (
	// Discard logger will print any log to io.Discard
	Discard = New(log.New(io.Discard, "", log.LstdFlags), Config{})
	// Default Default logger
	Default = New(log.New(os.Stdout, "\r\n", log.LstdFlags), Config{
		SlowThreshold:             200 * time.Millisecond,

		MountPath: "/tmp/drive1",
		ID:        "uuid",
		Error:     "",
	}

	b.SetBytes(1)
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		err := msgp.Encode(io.Discard, &v)
		if err != nil {
			b.Fatal(err)
		}
	}
}

func BenchmarkEncodeDiskInfoGOB(b *testing.B) {
	v := DiskInfo{
		Total:     1000,
		Free:      1000,
		Used:      1000,

	if err != nil {
		t.Fatal(err)
	}
	_, err = io.Copy(io.Discard, r)
	if err != nil {
		t.Fatal(err)
	}
	md5sum := r.MD5Current()
	if hex.EncodeToString(md5sum) != "e2fc714c4727ee9395f324cd2e7f331f" {

		return bytes.NewBuffer(make([]byte, 0, maxRecordSize))
	},
}

var bufioWriterPool = sync.Pool{
	New: func() interface{} {
		// io.Discard is just used to create the writer. Actual destination
		// writer is set later by Reset() before using it.
		return bufio.NewWriter(xioutil.Discard)
	},
}

// UnmarshalXML - decodes XML data.
func (c *CompressionType) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {