HarmonyOS checkbox复选框使用选择问题

参考示例如下：

@Entry
@Component
struct Index {
  build() {
    Row() {
      Column() {
        Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox1', group: 'checkboxGroup' })
            .selectedColor(0x39a2db)
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .onChange((value: boolean) => {
              console.info('Checkbox1 change is' + value)
            })
            .mark({
              strokeColor: Color.Black,
              size: 50,
              strokeWidth: 5
            })
            .unselectedColor(Color.Red)
            .width(30)
            .height(30)
          Text('Checkbox1').fontSize(20)
        }

        Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
          Checkbox({ name: 'checkbox2', group: 'checkboxGroup' })
            .selectedColor(0x39a2db)
            .shape(CheckBoxShape.ROUNDED_SQUARE)
            .onChange((value: boolean) => {
              console.info('Checkbox2 change is' + value)
            })
            .width(30)
            .height(30)
          Text('Checkbox2').fontSize(20)
        }
      }
      .width('100%')
    }
    .height('100%')
  }
}
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文档参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-basic-components-checkbox-V5