curl --request GET \
  --url https://api.example.com/codes/{version_id}/relations \
  --header 'Authorization: Bearer <token>'

{
  "parent": {
    "id": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "project_id": "<string>",
    "project_slug": "<string>",
    "user": "<string>",
    "version": "<string>",
    "name": "<string>",
    "parent_id": "<string>"
  },
  "children": [
    {
      "id": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "project_id": "<string>",
      "project_slug": "<string>",
      "user": "<string>",
      "version": "<string>",
      "name": "<string>",
      "parent_id": "<string>"
    }
  ]
}