code: async def get_dnssec_validation(cls) -> DNSSEC:
          
          data = await cls.get_config("dnssec_validation")
          return cls.DNSSEC.lookup(data)
docs: Enable DNSSEC validation of upstream zones.
  
          Only used when MAAS is running its own DNS server. This value is used
          as the value of 'dnssec_validation' in the DNS server config.