code: function ($edge) {
        var $node = $edge.parent();
        $edge.removeClass('hidden');
        $node.find('.spinner').remove();
        $node.children().removeAttr('style');
        this.$chart.data('inAjax', false);
        $('.oc-export-btn' + (this.options.chartClass !== '' ? '.' + this.options.chartClass : '')).prop('disabled', false);
      }
docs: terminate loading status for requesting new nodes