| 12345678910111213141516171819202122 | package signaltype Notifier struct {	c chan bool}func NewNotifier() *Notifier {	return &Notifier{		c: make(chan bool, 1),	}}func (n *Notifier) Signal() {	select {	case n.c <- true:	default:	}}func (n *Notifier) Wait() <-chan bool {	return n.c}
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