code: function() {
  
          var el;
  
          if (!this.el) {
  
              var attrs = _.extend({ id: this.id }, _.result(this, 'attributes'));
              if (this.className) attrs['class'] = _.result(this, 'className');
              el = V(_.result(this, 'tagName'), attrs).node;
  
          } else {
  
              el = _.result(this, 'el')
          }
  
          this.setElement(el, false);
      }
docs: Override the Backbone `_ensureElement()` method in order to create a `<g>` node that wraps all the nodes of the Cell view.