+ void rescale_proxy(int orig_scale, int new_scale);
+ void set_proxy(int new_scale, int use_scaler,
+ ArrayList<Indexable*> *orig_assets, ArrayList<Indexable*> *proxy_assets);
+ void add_proxy(int use_scaler,
+ ArrayList<Indexable*> *orig_assets, ArrayList<Indexable*> *proxy_assets);
+ Asset *get_proxy_asset();