const TracebackInnerFrames = tracebackInnerFrames
const TracebackOuterFrames = tracebackOuterFrames

var MapKeys = keys
var MapValues = values

var LockPartialOrder = lockPartialOrder

type TimeTimer = timeTimer

type LockRank lockRank

func (l LockRank) String() string {
	return lockRank(l).String()
}

const PreemptMSupported = preemptMSupported

type LFNode struct {
	Next    uint64

}

type (
	// Unexported version of *time.Location, just so we can store *time.Locations in
	// Values. (No user-provided value has this type.)
	timeLocation *time.Location

	// timeTime is for times where UnixNano is undefined.
	timeTime time.Time
)

// TimeValue returns a [Value] for a [time.Time].
// It discards the monotonic portion.
func TimeValue(v time.Time) Value {
	if v.IsZero() {

}

// A timer is a time.Timer, as an interface which can be replaced in tests.
type http2timer = interface {
	C() <-chan time.Time
	Reset(d time.Duration) bool
	Stop() bool
}

// timeTimer adapts a time.Timer to the timer interface.
type http2timeTimer struct {
	*time.Timer
}

func (t http2timeTimer) C() <-chan time.Time { return t.Timer.C }

const (