docs/packages/core/test/fixtures/page-trees/circular.test.json

{
  "type": "root",
  "$id": "root",
  "name": "Docs",
  "children": [
    {
      "type": "folder",
      "name": "A",
      "children": [
        {
          "$id": "a/page.mdx",
          "type": "page",
          "name": "First Page",
          "url": "/a/page"
        },
        {
          "type": "folder",
          "name": "B",
          "children": [
            {
              "$id": "a/b/page.mdx",
              "type": "page",
              "name": "Second Page",
              "url": "/a/b/page"
            }
          ],
          "$id": "a/b"
        }
      ],
      "$id": "a"
    }
  ]
}