for _, online := range nodesOnlineIndex {
		if online {
			nodesOnline++
		} else {
			nodesOffline++
		}
	}
	return
}

// NewNotificationSys - creates new notification system object.
func NewNotificationSys(endpoints EndpointServerPools) *NotificationSys {
	remote, all := newPeerRestClients(endpoints)
	return &NotificationSys{
		peerClients:    remote,
		allPeerClients: all,
	}