anchor.diff:            "RouteAllowList"
             "DHCPv6Client"
             "RouteMetric"
  +          "UseMTU"
  +          "UseGateway"
  +          "UseRoutePrefix"
  +          "Token"
           ])
           (assertValueOneOf "UseDNS" boolValues)
           (assertValueOneOf "UseDomains" (boolValues ++ ["route"]))
  
positive.code:           "LinkLocalAddressing"
            "IPv4LLRoute"
            "DefaultRouteOnDevice"
            "IPv6Token"
            "LLMNR"
            "MulticastDNS"
            "DNSOverTLS"
  
negative.code:           "Prefix"
            "PreferredLifetimeSec"
            "ValidLifetimeSec"
            "Token"
          ])
          (assertValueOneOf "AddressAutoconfiguration" boolValues)
          (assertValueOneOf "OnLink" boolValues)
  