[
  {
    "id": "ticket-01",
    "label": "billing"
  },
  {
    "id": "ticket-02",
    "label": "billing"
  },
  {
    "id": "ticket-03",
    "label": null
  },
  {
    "id": "document-01",
    "label": "contract"
  },
  {
    "id": "document-02",
    "label": "other"
  },
  {
    "id": "extra-01",
    "label": "invoice"
  }
]