code: def update(self, status=values.unset, announce_url=values.unset,
                 announce_method=values.unset):
          
          data = values.of({'Status': status, 'AnnounceUrl': announce_url, 'AnnounceMethod': announce_method, })
  
          payload = self._version.update(
              'POST',
              self._uri,
              data=data,
          )
  
          return ConferenceInstance(
              self._version,
              payload,
              account_sid=self._solution['account_sid'],
              sid=self._solution['sid'],
          )
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