code: func (kl *Kubelet) reconcileExtendedResource(initialNode, node *v1.Node) bool {
  	requiresUpdate := false
  	for k := range node.Status.Capacity {
  		if v1helper.IsExtendedResourceName(k) {
  			klog.Infof("Zero out resource %s capacity in existing node.", k)
  			node.Status.Capacity[k] = *resource.NewQuantity(int64(0), resource.DecimalSI)
  			node.Status.Allocatable[k] = *resource.NewQuantity(int64(0), resource.DecimalSI)
  			requiresUpdate = true
  		}
  	}
  	return requiresUpdate
  }
docs: // Zeros out extended resource capacity during reconciliation.