zoneinfo = nil
	zoneinfoOnce = sync.Once{}
}

var (
	DisablePlatformSources = disablePlatformSources
	GorootZoneSource       = gorootZoneSource
	ParseTimeZone          = parseTimeZone
	SetMono                = (*Time).setMono
	GetMono                = (*Time).mono
	ErrLocation            = errLocation
	ReadFile               = readFile
	LoadTzinfo             = loadTzinfo
	NextStdChunk           = nextStdChunk

	t1 := Unix(1483228799, 995e6)
	SetMono(&t1, 123456789012345)

	t2 := Unix(1483228799, 5e6)
	SetMono(&t2, 123456789012345+10e6)

	t3 := Unix(1483228799, 995e6)
	SetMono(&t3, 123456789012345+1e9)

	t1w := t1.AddDate(0, 0, 0)
	if GetMono(&t1w) != 0 {
		t.Fatalf("AddDate didn't strip monotonic clock reading")
	}
	t2w := t2.AddDate(0, 0, 0)
	if GetMono(&t2w) != 0 {

 func (t <esc:0x1> <type 28>) UnmarshalText (data <esc:0x1> <type 37 [] <type -20>>) <type -19>;
 func (t <esc:0x1> <type 12>) Equal (u <esc:0x1> <type 12>) <type -15>;
 func (t <esc:0x1> <type 28>) .time.setMono (m <type -4>);
 func (t <esc:0x1> <type 12>) Year () <type -11>;
 func (t <esc:0x1> <type 12>) IsZero () <type -15>;
 func (t <esc:0x1> <type 28>) .time.addSec (d <type -4>);

func (t *Time) stripMono() {
	if t.wall&hasMonotonic != 0 {
		t.ext = t.sec()
		t.wall &= nsecMask
	}
}

// setMono sets the monotonic clock reading in t.
// If t cannot hold a monotonic clock reading,
// because its wall time is too large,
// setMono is a no-op.
func (t *Time) setMono(m int64) {
	if t.wall&hasMonotonic == 0 {
		sec := t.ext
		if sec < minWall || maxWall < sec {
			return
		}