{
  # reverse data expression
  # empty configs are not accepted by Kea
  "Dhcp6": {
    "valid-lifetime": 1800,
    "client-classes": [
      # reduce literals
      {
        "name": "literal",
        /// from: match if (option dhcp6.client-data) = (reverse(2 & 2, 'foobar'))
        "test": "option[45].hex == 'arobfo'"
      }
    ]
  }
}