How to configure tooltip and legend shape as rectangles with rounded corners

tooltip: {
    mark: {
      content: [
        {
          shapeType: 'rectRound',
          key: datum => datum['type'],
          value: datum => datum['value'] + '%'
        }
      ]
    }
  }

legends: {
    visible: true,
    orient: 'right',

    item: {
      width: '15%',
      shape: {
        style: {
          symbolType: 'rectRound'
        }
      }
    }
  },

const spec = {
  type: 'pie',
  data: [
    {
      id: 'pie',
      values: [
  { value: 10, category: 'One' },
  { value: 9, category: 'Two' },
  { value: 6, category: 'Three' },
  { value: 5, category: 'Four' },
  { value: 4, category: 'Five' },
  { value: 3, category: 'Six' },
  { value: 1, category: 'Seven' }
]
    }
  ],
  categoryField: 'category',
  valueField: 'value',
  legends: {
    visible: true,
    orient: 'right',

    item: {
      width: '15%',
      shape: {
        style: {
          symbolType: 'rectRound'
        }
      }
    }
  },
  tooltip: {
    mark: {
      content: [
        {
          shapeType: 'rectRound',
          key: datum => datum['type'],
          value: datum => datum['value'] + '%'
        }
      ]
    }
  }
};

const vchart = new VChart(spec, { dom: CONTAINER_ID });

vchart.renderSync();

// Just for the convenience of console debugging, DO NOT COPY!
window['vchart'] = vchart;