任何人都可以帮助转换以下父子对象列表:[{"name":"root","_id":"root_id",},{"name":"a1","parentAreaRef":{"id":"root_id",},"_id":"a1_id",},{"name":"a2","parentAreaRef":{"id":"a1_id",},"_id":"a2_id",},{"name":"a3","parentAreaRef":{"id":"a2_id",},"_id":"a3_id",},{"name":"b1","parentAreaRef":{"id":"root_id",},"_id":"b1_i