code: def update(self, attributes=values.unset, date_created=values.unset,
                 date_updated=values.unset):
          
          return self._proxy.update(
              attributes=attributes,
              date_created=date_created,
              date_updated=date_updated,
          )
docs: Update the ParticipantInstance
  
          :param unicode attributes: An optional string metadata field you can use to store any data you wish.
          :param datetime date_created: The date that this resource was created.
          :param datetime date_updated: The date that this resource was last updated.
  
          :returns: Updated ParticipantInstance
          :rtype: twilio.rest.messaging.v1.session.participant.ParticipantInstance