code: def update(self, data=values.unset, ttl=values.unset, item_ttl=values.unset,
                 collection_ttl=values.unset):
          
          return self._proxy.update(data=data, ttl=ttl, item_ttl=item_ttl, collection_ttl=collection_ttl, )
docs: Update the SyncMapItemInstance
  
          :param dict data: Contains an arbitrary JSON object to be stored in this Map Item.
          :param unicode ttl: Alias for item_ttl
          :param unicode item_ttl: Time-to-live of this item in seconds, defaults to no expiration.
          :param unicode collection_ttl: Time-to-live of this item's parent Map in seconds, defaults to no expiration.
  
          :returns: Updated SyncMapItemInstance
          :rtype: twilio.rest.sync.v1.service.sync_map.sync_map_item.SyncMapItemInstance