def update(self, include_credentials=values.unset, friendly_name=values.unset):
        """
        Update the ServiceInstance

        :param bool include_credentials: The include_credentials
        :param unicode friendly_name: The friendly_name

        :returns: Updated ServiceInstance
        :rtype: twilio.rest.serverless.v1.service.ServiceInstance
        """
        return self._proxy.update(include_credentials=include_credentials, friendly_name=friendly_name, )