如何设置漏斗图中的每个系列的小标题echarts funnel配置项内容和展示

如何设置漏斗图中的每个系列的小标题。在漏斗图中创建了多个SERIES，想给每个series设置下方标题。请问如何设置呢。比如在样例中第一个漏斗下面显示 “ 标题一” ， 第二，第三以此类推。谢谢。

      // 指定图表的配置项和数据
      var option = {
        title: {
          text: 'ABC test Funnel(Compare)',
          subtext: '',
          left: 'left',
          top: 'bottom'
        },
        tooltip: {
          trigger: 'item',
          formatter: "{a} <br/>{b} : {c}"
        },
label: {normal: {show: true, formatter: '{b} : {c}' }},
        toolbox: {
          show: true,
          orient: 'horizontal',
          top: 'top',
          feature: {
            dataView: {
              readOnly: false
            },
            restore: {},
            saveAsImage: {}
          }
        },
        legend: {
          orient: 'horizontal',
          left: 'right',
          top: 'bottom',
          data: ['first', 'second', 'third']
        },
        calculable: true,
        series: [{
          name: 'test Funnel 30 Days',
          type: 'funnel',
          width: '20%',
          height: '80%',
          left: '5%',
          top: '5%',
          // funnelAlign: 'left',
	  // label: {normal: {show: true, formatter: '{a}' }},
          center: ['25%', '33%'], // for pie

          data: [{
            value: 10,
            name: 'third'
          }, {
            value: 50,
            name: 'second'
          }, {
            value: 100,
            name: 'first'
          }]
	  
        }, {
          name: 'test Funnel 60 Days',
          type: 'funnel',
          width: '20%',
          height: '80%',
          left: '30%',
          top: '5%',
          // funnelAlign: 'left',

          center: ['25%', '66%'], // for pie

          data: [{
            value: 20,
            name: 'third'
          },
	  {
            value: 80,
            name: 'second'
          },
	  {
            value: 150,
            name: 'first'
          }]
	  
        }, {
          name: 'test_Funnel_90_DAYS',
          type: 'funnel',
          width: '20%',
          height: '80%',
          left: '55%',
          top: '5%',
          // funnelAlign: 'right',

          center: ['25%', '66%'], // for pie

          data: [{
            value: 200,
            name: 'first'
          },
	  {
            value: 100,
            name: 'second'
          },
	  {
            value: 40,
            name: 'third'
          }]
        }]
      };