@Override
 protected void onExit() {
   final XmlNode root = configurer.getRoot();
   root.removeChildren(ConfigAnimations.ANIMATION);
   for (final TreeItem item : animationList.getTree().getItems()) {
     final Animation animation = (Animation) item.getData();
     final XmlNode nodeAnim = ConfigAnimations.createNode(animation);
     root.add(nodeAnim);
   }
   configurer.save();
 }
 @Override
 public void notifyObjectDeleted(TileGroup group) {
   final MapTile map = WorldViewModel.INSTANCE.getMap();
   final Media config = map.getGroupsConfig();
   final XmlNode node = Stream.loadXml(config);
   final Collection<XmlNode> toRemove = new ArrayList<>();
   for (final XmlNode nodeGroup : node.getChildren(ConfigTileGroup.GROUP)) {
     if (WorldViewRenderer.groupEquals(
         nodeGroup.readString(ConfigTileGroup.NAME), group.getName())) {
       toRemove.add(nodeGroup);
     }
   }
   for (final XmlNode remove : toRemove) {
     node.removeChild(remove);
   }
   toRemove.clear();
   Stream.saveXml(node, config);
   map.loadGroups(config);
 }