a: [
                    ['Toyota', 4],
                    ['Opel', 2],
                    ['Volkswagen', 2]
                ]
            }];

            var chart = testHelper.create(echarts, 'main0', {
                title: [
                    'Drilldown of bar chart.'
                ],
                recordVideo: true,
                option: option
                // height: 300,
                // buttons: [{text: 'btn-txt', onclick: function () {}}],
            });

            chart.on('cli