          },
                xAxis: {
                    data: []
                },
                yAxis: {},
                series: [{
                    name: 'no point',
                    type: 'line',
                    data: []
                }, {
                    name: 'one point',
                    type: 'line',
                    data: [43]
                }, {
                    name: 'two points',
                    type: 'line',
                    data: [43, 99]
                