code: func (s *GenericAPIServer) AddHealthzChecks(checks ...healthz.HealthzChecker) error {
  	s.healthzLock.Lock()
  	defer s.healthzLock.Unlock()
  
  	if s.healthzCreated {
  		return fmt.Errorf("unable to add because the healthz endpoint has already been created")
  	}
  
  	s.healthzChecks = append(s.healthzChecks, checks...)
  	return nil
  }
docs: // AddHealthzCheck allows you to add a HealthzCheck.