def update(self, status=values.unset, announce_url=values.unset,<EOL>announce_method=values.unset):
data = values.of({'<STR_LIT>': status, '<STR_LIT>': announce_url, '<STR_LIT>': announce_method, })<EOL>payload = self._version.update(<EOL>'<STR_LIT:POST>',<EOL>self._uri,<EOL>data=data,<EOL>)<EOL>return ConferenceInstance(<EOL>self._version,<EOL>payload,<EOL>account_sid=self._solution['<STR_LIT>'],<EOL>sid=self._solution['<STR_LIT>'],<EOL>)<EOL>
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