[
  {
    "id": "F1",
    "title": "Notebook",
    "link": "https://example.com/notebook"
  },
  {
    "id": "F1",
    "title": "Pen",
    "link": "not-a-url"
  },
  {
    "id": "F3",
    "title": "",
    "link": "https://example.com/folder"
  }
]