code: function ($node, data) {
        this.buildChildNode($node.closest('table'), data);
        if (!$node.children('.bottomEdge').length) {
          $node.append('<i class="edge verticalEdge bottomEdge fa"></i>');
        }
        if (!$node.find('.symbol').length) {
          $node.children('.title').prepend('<i class="fa '+ this.options.parentNodeSymbol + ' symbol"></i>');
        }
        if (this.isInAction($node)) {
          this.switchVerticalArrow($node.children('.bottomEdge'));
        }
      }
docs: exposed method