{
  # vendor option space config
  "Dhcp4": {
    "option-def": [
      {
        "space": "foo",
        "name": "bar",
        "code": 1,
        "type": "string"
      }
    ],
    "client-classes": [
      # class declaration
      {
        "name": "foobar",
        /// from: match if (option dhcp.vendor-class-identifier) = 'foo'
        "test": "option[60].hex == 'foo'",
        "option-def": [
          {
            "name": "vendor-encapsulated-options",
            "code": 43,
            "type": "empty",
            "encapsulate": "foo"
          }
        ],
        "option-data": [
          {
            "name": "vendor-encapsulated-options",
            "code": 43
          },
          {
            "space": "foo",
            "name": "bar",
            "code": 1,
            "data": "foobar"
          }
        ]
      }
    ]
  }
}