docs: def create(self, domain_name, partner_id=None):
          """Register a domain you control with netki as a Gem-managed domain.
          Note: After registering a domain, unless you have already set up its
          DNSSEC/DS Records, you'll need to do so: http://docs.netki.apiary.io
          The information required will be an attribute of the returned NetkiDomain
          object.
  
          Args:
            domain_name (str): Domain to add (e.g. 'gem.co')
            partner_id (str, optional): your netki partner_id (if you have one)
  
          Returns: The new round.NetkiDomain
          """
          params = dict(domain_name=domain_name)
  
          if partner_id: params['partner_id'] = partner_id
  
          domain = self.wrap(self.resource.create(params))
  
          self.add(domain)
          return domain