{
  "skeleton_anchors": [
    {
      "ref_id": "@e1",
      "pid": 42,
      "role": "group",
      "name": "Sidebar",
      "root_ref": null
    },
    {
      "ref_id": "@e2",
      "pid": 42,
      "role": "group",
      "name": "Toolbar",
      "root_ref": null
    }
  ],
  "drilled_from_e1": [
    {
      "ref_id": "@e3",
      "pid": 42,
      "role": "treeitem",
      "name": "Recents",
      "root_ref": "@e1"
    },
    {
      "ref_id": "@e4",
      "pid": 42,
      "role": "treeitem",
      "name": "Documents",
      "root_ref": "@e1"
    }
  ],
  "drilled_from_e2": [
    {
      "ref_id": "@e5",
      "pid": 42,
      "role": "button",
      "name": "Back",
      "root_ref": "@e2"
    }
  ],
  "expected_total": 5
}