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| [ { "id": 1, "title": "第一层1000", "parentId": 0, "children": [ { "id": 3, "title": "第二层1100", "parentId": 1, "children": [ { "id": 8, "title": "第三层1110", "parentId": 3, "children": [ ] }, { "id": 9, "title": "第三层1120", "parentId": 3, "children": [ ] } ] }, { "id": 4, "title": "第二层1200", "parentId": 1, "children": [ ] }, { "id": 5, "title": "第二层1300", "parentId": 1, "children": [ ] } ] }, { "id": 2, "title": "第一层2000", "parentId": 0, "children": [ { "id": 6, "title": "第二层2100", "parentId": 2, "children": [ ] }, { "id": 7, "title": "第二层2200", "parentId": 2, "children": [ ] } ] } ]
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