code: def update(self, data=values.unset, ttl=values.unset):
          
          return self._proxy.update(data=data, ttl=ttl, )
docs: 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