code: function(cell) {
  
          var id = _.isString(cell) ? cell : cell.id;
          
          var $view = this.$('[model-id="' + id + '"]');
          if ($view.length) {
  
              return $view.data('view');
          }
          return undefined;
      }
docs: Find a view for a model `cell`. `cell` can also be a string representing a model `id`.