code: function(el, selector) {
  
          if (el === this.el) {
  
              return selector;
          }
  
          var index = $(el).index();
  
          selector = el.tagName + ':nth-child(' + (index + 1) + ')' + ' ' + (selector || '');
  
          return this.getSelector($(el).parent()[0], selector + ' ');
      }
docs: Construct a unique selector for the `el` element within this view. `selector` is being collected through the recursive call. No value for `selector` is expected when using this method.