{
  "type": "object",
  "properties": {
    "id": { "type": "integer" },
    "iid": { "type": "integer" },
    "title": { "type": "string" },
    "group_id": { "type": "integer" },
    "parent_id": { "type": ["integer", "null"] },
    "has_children": { "type": "boolean" },
    "has_issues": { "type": "boolean" },
    "reference": { "type": "string" },
    "url": { "type": "string" },
    "relation_url": { "type": "string" }
  },
  "required": [
    "id", "iid", "group_id", "title", "parent_id", "has_children", "has_issues", "reference", "url", "relation_url"
  ],
  "additionalProperties": false
}
