anchor.diff:    @override
     Future<dynamic> GetFuture() {
       return _future;
  +  }
  +
  +  @override
  +  String toString() {
  +    return "ImageTexture[${_url}, ${_textureType}]";
     }
   }
   
  
positive.code:     gl.texImage2D(
          _textureType, 0, WEBGL.RGBA, WEBGL.RGBA, WEBGL.UNSIGNED_BYTE, _canvas);
    }
  }
  
  class ImageTexture extends Texture {
  
negative.code:   dynamic GetData() {
      return _data;
    }
  
    @override
    String toString() {
      return "TypedTexture[${_url}, ${_dataType}, ${_format_type}]";
    }
  }
  
  class CubeTexture extends Texture {
  