{
  "type": "object",
  "allOf": [
    { "$ref": "../public_api/v4/commit/basic.json" },
    {
      "type": "object",
      "required": [
        "author_gravatar_url",
        "commit_url",
        "commit_path",
        "author"
      ],
      "properties": {
        "author_gravatar_url": { "type": "string" },
        "commit_url": { "type": "string" },
        "commit_path": { "type": "string" },
        "author": {
          "oneOf": [
            { "type": "null" },
            { "$ref": "user.json" }
          ]
        }
      }
    }
  ]
}