eventGroup

type Event struct {
	// contains filtered or unexported fields
}

type WaitGroup interface {
	// Register waits returns a chan that waits on the given ID.
	// The chan will be triggered when Trigger is called with
	// the same ID.
	Register(timeout time.Duration, count int, data interface{}, callbackFunc func(data interface{})) (id uint64)
	// Trigger triggers the waiting chans with the given ID.
	Trigger(id uint64)
	IsRegistered(id uint64) bool
}