{
  "oneOf": [
    {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "present": {
          "const": false
        }
      },
      "required": [
        "present"
      ]
    },
    {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "present": {
          "const": true
        },
        "value": {}
      },
      "required": [
        "present",
        "value"
      ]
    }
  ]
}