code: function ($currentRoot, data) {
        this.buildParentNode($currentRoot, data);
        if (!$currentRoot.children('.topEdge').length) {
          $currentRoot.children('.title').after('<i class="edge verticalEdge topEdge fa"></i>');
        }
        if (this.isInAction($currentRoot)) {
          this.switchVerticalArrow($currentRoot.children('.topEdge'));
        }
      }
docs: exposed method