void OnTriggerExit2D(Collider2D collider)
 {
     foreach (KeyValuePair <Edge, MapNode> item in chunkScript.mapNode.Neighbors)
     {
         Swapper neighborSwapper = item.Value.chunkScript.GetComponentInChildren <Swapper>();
         neighborSwapper.TrySwapInto(collider.attachedRigidbody.gameObject);
     }
 }