private final AssetManager assetManager = new AssetManager();
private final ObjectMap<String, AssetGroup> assetGroupMap = new ObjectMap<String, AssetGroup>();
private final ObjectMap<String, String> aliasFilenameMap = new ObjectMap<String, String>();
public AssetService() {
FileHandleResolver resolver = new InternalFileHandleResolver();
assetManager.setLoader(SpritePack.class, new SpritePackLoader(resolver));
}