{
  "total": "4358676",
  "unit": "count",
  "height": 27,
  "data": [
    {
      "id": "root"
    },
    {
      "id": "child_1",
      "parentIds": ["root", "loop_child"]
    },
    {
      "id": "child_2",
      "parentIds": ["root"]
    },
    {
      "id": "grandchild_1",
      "parentIds": ["child_1"]
    },
    {
      "id": "grandchild_2",
      "parentIds": ["child_1"]
    },
    {
      "id": "loop_child",
      "parentIds": ["grandchild_1"]
    }
  ]
}