code: function (model) {
              var items = this._element.querySelectorAll('[kb-item]');
              for (var i = 0; i < items.length; i++) {
                  var kbItem = angular.element(items.item(i)).controller('kbItem');
                  if (kbItem.model === model) {
                      return kbItem;
                  }
              }
          }
docs: Returns the (first) kbItemController  which has the given model value.
  @returns {KbItemController}