{
  "$id": "http://localhost:1234/draft2019-09/detached-ref.json",
  "$schema": "https://json-schema.org/draft/2019-09/schema",
  "$defs": {
    "foo": {
      "$ref": "#detached"
    },
    "detached": {
      "$anchor": "detached",
      "type": "integer"
    }
  }
}