如何在Vuejs Treeview中添加复选框并链接到模型？

<template>
  <div>
    <treeview :data="treeData" :selected-items="selectedItems"></treeview>
  </div>
</template>

<script>
import Treeview from 'vuejs-treeview';

export default {
  components: {
    Treeview
  },
  data() {
    return {
      treeData: [
        {
          label: 'Node 1',
          children: [
            {
              label: 'Node 1.1',
              children: [
                {
                  label: 'Node 1.1.1'
                },
                {
                  label: 'Node 1.1.2'
                }
              ]
            },
            {
              label: 'Node 1.2'
            }
          ]
        },
        {
          label: 'Node 2'
        }
      ],
      selectedItems: []
    };
  },
  methods: {
    handleCheckboxChange(item) {
      if (this.selectedItems.includes(item)) {
        this.selectedItems = this.selectedItems.filter(i => i !== item);
      } else {
        this.selectedItems.push(item);
      }
    }
  }
};
</script>