loadWithAnimation(url, options, environment, loader) {
        if (!options.Animation || !options.Animation.Url) {
            return new Promise(resolve => {
                resolve(null);
            });
        }

        return new Promise(resolve => {
            loader.loadWithAnimation(url, [environment.server + options.Animation.Url], mmd => {
                resolve(mmd);
            }, undefined, () => {
                resolve(null);
            });
        });
    }
MMDLoader
@author tengge / https://github.com/tengge1