{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "state",
    "title"
  ],
  "properties": {
    "state": {
      "enum": [
        "empty",
        "loading",
        "error"
      ]
    },
    "title": {
      "type": "string"
    },
    "detail": {
      "type": "string"
    }
  }
}