: should tooltip correct.',
                        axisPointer: {
                            snap: false
                        }
                    }],
                    yAxis: [{}, {gridIndex: 1}, {gridIndex: 2}],
                    grid: [{
                        top: 10,
                        height: 100
                    }, {
                        top: 200,
                        height: 100
                    }, {
                        top: 400,
                        height: 200
  