code: def update(self, include_credentials=values.unset, friendly_name=values.unset):
          
          return self._proxy.update(include_credentials=include_credentials, friendly_name=friendly_name, )
docs: 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