func (b *Blockchain) RegisterNotifee(n BlockchainNotifee) {
	b.notifeeLock.Lock()
	defer b.notifeeLock.Unlock()
	b.notifees = append(b.notifees, n)
}
// RegisterNotifee registers a notifee for blockchain
RegisterNotifee registers a notifee for blockchain
// RegisterNotifee registers a notifee for blockchain
func (b *Blockchain) RegisterNotifee(n BlockchainNotifee) {
	b.notifeeLock.Lock()
	defer b.notifeeLock.Unlock()
	b.notifees = append(b.notifees, n)
}
func ( b * Blockchain ) RegisterNotifee ( n BlockchainNotifee ) { b . notifeeLock . Lock ( ) defer b . notifeeLock . Unlock ( ) b . notifees = append ( b . notifees , n ) }
RegisterNotifee registers a notifee for blockchain
RegisterNotifee registers a notifee for blockchain