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// 原始数据转化前
const data = [{
    id: 'f',
    body: {
      next: ['a','b']
    }
},{
    id: 'a',
    body: {
      next: ['k']
    }
},{
    id: 'b',
    body: {
      next: []
    }
}]

// 数据转化后
const preData = [{
    id: 'f',
    children: [{
        id: 'a',
        children: [{
            id: 'k',
            children: []
        }]
    },{
        id: 'b',
        children: []
    }]
}]

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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