code: function() {
  
          var markup = this.model.markup || this.model.get('markup');
          
          if (markup) {
  
              var nodes = V(markup);
              V(this.el).append(nodes);
              
          } else {
  
              throw new Error('properties.markup is missing while the default render() implementation is used.');
          }
  
          this.update();
  
          this.resize();
          this.rotate();
          this.translate();        
  
          return this;
      }
docs: `prototype.markup` is rendered by default. Set the `markup` attribute on the model if the default markup is not desirable.