type flag.durationValue

8 uses

	flag (current package)
		flag.go#L261: type durationValue time.Duration
		flag.go#L263: func newDurationValue(val time.Duration, p *time.Duration) *durationValue {
		flag.go#L265: 	return (*durationValue)(p)
		flag.go#L268: func (d *durationValue) Set(s string) error {
		flag.go#L273: 	*d = durationValue(v)
		flag.go#L277: func (d *durationValue) Get() any { return time.Duration(*d) }
		flag.go#L279: func (d *durationValue) String() string { return (*time.Duration)(d).String() }
		flag.go#L492: 	case *durationValue: