def update(self, data=values.unset, ttl=values.unset):
return self._proxy.update(data=data, ttl=ttl, )<EOL>
Update the DocumentInstance

:param dict data: Contains an arbitrary JSON object to be stored in this Document.
:param unicode ttl: New time-to-live of this Document in seconds.

:returns: Updated DocumentInstance
:rtype: twilio.rest.sync.v1.service.document.DocumentInstance