new_contents: from twilio import TwilioException
  from twilio.rest.resources import InstanceResource
  from twilio.rest.resources import ListResource
  
  
  class Address(InstanceResource):
      pass
  
  class Addresses(ListResource):
  
      def update(self, sid, **kwargs):
          if 'iso_country' in kwargs:
              raise TwilioException(
                  'Canont update iso_country on an existing Address'
              )
  
          return self.update_instance(sid, kwargs)
  
subject: Add address compatibility