// Return a function which update the global stats related to tcp connections
func setupReqStatsUpdate(req *http.Request) (*http.Request, func()) {
	var dialStart, dialEnd int64
	start := time.Now()
	trace := &httptrace.ClientTrace{
		GotFirstResponseByte: func() {
			atomic.AddUint64(&globalStats.tcpTimeForFirstByteTotalDur, uint64(time.Since(start)))
		},
		ConnectStart: func(network, addr string) {
			atomic.StoreInt64(&dialStart, time.Now().UnixNano())

	}
	if !reflect.DeepEqual(v, v2) {
		t.Errorf("MSS: %v != %v", v, v2)
	}
}

func BenchmarkMarshalMsgMSS(b *testing.B) {
	v := MSS{"abc": "def", "ghi": "jkl"}
	b.ReportAllocs()

	for b.Loop() {
		v.MarshalMsg(nil)
	}
}

func BenchmarkAppendMsgMSS(b *testing.B) {
	v := MSS{"abc": "def", "ghi": "jkl"}
	bts := make([]byte, 0, v.Msgsize())
	bts, _ = v.MarshalMsg(bts[0:0])

	Constraint string // length(phone) >= 10
	*Field
}

func (chk *CheckConstraint) GetName() string { return chk.Name }

func (chk *CheckConstraint) Build() (sql string, vars []interface{}) {
	return "CONSTRAINT ? CHECK (?)", []interface{}{clause.Column{Name: chk.Name}, clause.Expr{SQL: chk.Constraint}}
}

// ParseCheckConstraints parse schema check constraints
func (schema *Schema) ParseCheckConstraints() map[string]CheckConstraint {

//
//nolint:unused
func setTCPParametersFn(opts TCPOptions) func(network, address string, c syscall.RawConn) error {
	return func(network, address string, c syscall.RawConn) error {
		return nil
	}
}

// DialContext is a function to make custom Dial for internode communications
type DialContext func(ctx context.Context, network, address string) (net.Conn, error)

	globalMetricsV3Once           sync.Once
)

func newMetricsV3Server(auth func(h http.Handler) http.Handler) *metricsV3Server {
	registry := prometheus.NewRegistry()
	metricGroups := newMetricGroups(registry)
	globalMetricsV3Once.Do(func() {
		globalMetricsV3CollectorPaths = metricGroups.collectorPaths
	})
	return &metricsV3Server{
		registry: registry,
		opts: promhttp.HandlerOpts{
			ErrorLog:            promLogger{},

)

var parquetSupport bool

func init() {
	parquetSupport = env.Get("MINIO_API_SELECT_PARQUET", config.EnableOff) == config.EnableOn
}

var bufPool = bpool.Pool[*bytes.Buffer]{
	New: func() *bytes.Buffer {
		// make a buffer with a reasonable capacity.
		return bytes.NewBuffer(make([]byte, 0, maxRecordSize))
	},
}

var bufioWriterPool = bpool.Pool[*bufio.Writer]{
	New: func() *bufio.Writer {

	ctxCanceler context.CancelFunc
}

// start - starts separate goroutine for each TCP listener.  A valid new connection is passed to httpListener.acceptCh.
func (listener *httpListener) start() {
	// Closure to handle listener until httpListener.ctxDoneCh channel is closed.
	handleListener := func(idx int, ln net.Listener) {
		for {
			conn, err := ln.Accept()
			select {
			case listener.acceptCh <- acceptResult{conn, err, idx}:

			r = append(r, v)
		}
	}

	sort.Slice(r, func(i, j int) bool {
		return r[i].User < r[j].User
	})

	return r
}

// Assumes store is locked by caller. If groups is empty, returns all group mappings.
func (store *IAMStoreSys) listGroupPolicyMappings(cache *iamCache, groupsSet set.StringSet,
	groupPredicate func(string) bool, decodeFunc func(string) string,
) []madmin.GroupPolicyEntities {

type FilterRule struct {
	Name  string `xml:"Name"`
	Value string `xml:"Value"`
}

func (filter FilterRule) isEmpty() bool {
	return filter.Name == "" && filter.Value == ""
}

// MarshalXML implements a custom marshaller to support `omitempty` feature.
func (filter FilterRule) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if filter.isEmpty() {
		return nil
	}

		t.Run(fmt.Sprintf("Test %d", i+1), func(t *testing.T) {
			var filter Filter
			err := xml.Unmarshal([]byte(tc.inputXML), &filter)
			if err != nil {
				t.Fatalf("%d: Expected no error but got %v", i+1, err)
			}
			err = filter.Validate()
			if err != tc.expectedErr {
				t.Fatalf("%d: Expected %v but got %v", i+1, tc.expectedErr, err)
			}
		})
	}
}

func TestObjectSizeFilters(t *testing.T) {