{
  "properties": {
    "visibility": {
      "description": "Denotes whether an email is publicly visible.",
      "type": "string",
      "enum": [
        "public",
        "private"
      ]
    }
  },
  "required": [
    "visibility"
  ],
  "type": "object",
  "$schema": "https://json-schema.org/draft/2019-09/schema"
}