code: func (gc *GarbageCollector) resyncMonitors(deletableResources map[schema.GroupVersionResource]struct{}) error {
  	if err := gc.dependencyGraphBuilder.syncMonitors(deletableResources); err != nil {
  		return err
  	}
  	gc.dependencyGraphBuilder.startMonitors()
  	return nil
  }
docs: // resyncMonitors starts or stops resource monitors as needed to ensure that all
  // (and only) those resources present in the map are monitored.