docs: function ImageLoader(url, crossorigin)
  {
      EventTarget.call(this);
  
      /**
       * The texture being loaded
       *
       * @property texture
       * @type Texture
       */
      this.texture = Texture.fromImage(url, crossorigin);
  
      /**
       * if the image is loaded with loadFramedSpriteSheet
       * frames will contain the sprite sheet frames
       *
       */
      this.frames = [];
  }