fromAsset method
asset - path of the file to be loaded
package - if the file is from another flutter package add the name of the package here
Implementation
@override
Future<Material?> fromAsset(String asset, {String? package}) async{
_init();
ThreeFile? tf = await _loader.fromAsset(asset,package: package);
return tf == null?null:_parse(tf.data);
}