ECharts 折线图中如何定义多种 MarkPoint？

option = {  series: [{    type: 'line',    data: [120, 132, 101, 134, 90, 230, 210],    markPoint: {      data: [        {          name: '最大值',          value: 230,          symbol: 'circle',          symbolSize: 15,          label: {            position: 'top',            offset: [0, -20],            formatter: '{b}{c}'          },          itemStyle: {            color: 'red'          }        },        {          name: '最小值',          value: 90,          symbol: 'rect',          symbolSize: 10,          label: {            position: 'bottom',            offset: [0, 20],            formatter: '{b}{c}'          },          itemStyle: {            color: 'green'          }        }      ]    }  }]};