{
  # ddns-updates (aka enable-updates)
  "Dhcp6": {
    "dhcp-ddns": {
      /// Unspecified ddns-domainname (default domain-name option value)
      /// Kea requires a qualifying-suffix
      /// Initialized to "": please put a value
      "qualifying-suffix": "",
      "enable-updates": true
    },
    "client-classes": [
      # embedded
      {
        "name": "foo"
//      /// Only global enable-updates is supported
//      "enable-updates": false
      }
    ]
  }
}