code: func (o *NamespaceControllerOptions) ApplyTo(cfg *namespaceconfig.NamespaceControllerConfiguration) error {
  	if o == nil {
  		return nil
  	}
  
  	cfg.NamespaceSyncPeriod = o.NamespaceSyncPeriod
  	cfg.ConcurrentNamespaceSyncs = o.ConcurrentNamespaceSyncs
  
  	return nil
  }
docs: // ApplyTo fills up NamespaceController config with options.