如何交换两个bootstrap-vue多个选择框中选中的选项？

<b-form-select v-model="options[0]">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</b-form-select>

<b-form-select v-model="options[1]">
  <option value="option4">Option 4</option>
  <option value="option5">Option 5</option>
  <option value="option6">Option 6</option>
</b-form-select>

methods: {
  swapOptions() {
    const temp = this.options[0];
    this.options[0] = this.options[1];
    this.options[1] = temp;
  }
}

<button @click="swapOptions">交换选项</button>