code: function() {
        var objects = this.getObjects();
        var markup = [
          '<g ',
            'width="', this.width, '" ',
            'height="', this.height, '" ',
            'style="', this.getSvgStyles(), '" ',
            'transform="', this.getSvgTransform(), '" ',
          '>'
        ];
  
        for (var i = 0, len = objects.length; i < len; i++) {
          markup.push(objects[i].toSVG());
        }
        markup.push('</g>');
  
        return markup.join('');
      }
docs: Returns svg representation of an instance
  @method toSVG
  @return {string} svg representation of an instance