code: def update(self, status=values.unset, announce_url=values.unset,
                 announce_method=values.unset):
          
          return self._proxy.update(status=status, announce_url=announce_url, announce_method=announce_method, )
docs: Update the ConferenceInstance
  
          :param ConferenceInstance.UpdateStatus status: The new status of the resource
          :param unicode announce_url: The URL we should call to announce something into the conference
          :param unicode announce_method: he HTTP method used to call announce_url
  
          :returns: Updated ConferenceInstance
          :rtype: twilio.rest.api.v2010.account.conference.ConferenceInstance