notifiee.go
func (nb *NotifyBundle) Connected(n Network, c Conn) {
	if nb.ConnectedF != nil {
		nb.ConnectedF(n, c)
	}
}
func (nb *NotifyBundle) Connected(n Network, c Conn) {
	if nb.ConnectedF != nil {
		nb.ConnectedF(n, c)
	}
}
// Connected calls ConnectedF if it is not null.