echarts 中如何将 legend 设置成「直线」

legend: {
    itemHeight: 2,
    itemWidth: 20,
    data: ['Expenses', 'Income']
  }

legend: {
    itemHeight: 20,
    itemWidth: 20,
    data: [{
      name: 'Expenses',
      icon: 'react'
    }, {
      name: 'Income',
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* icon: 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*/
    }]
  }