public void RemoveBatterySpawnedEvent(BatterySpawned batterySpawnedEvent)
 {
     onBatterySpawned -= batterySpawnedEvent;
 }
        public BatteryController[] RegisterBatterySpawned(BatterySpawned batterySpawnedEvent)
        {
            onBatterySpawned += batterySpawnedEvent;

            return(batteries.ToArray());
        }