code: func (n *NodeInfo) VolumeLimits() map[v1.ResourceName]int64 {
  	volumeLimits := map[v1.ResourceName]int64{}
  	for k, v := range n.AllocatableResource().ScalarResources {
  		if v1helper.IsAttachableVolumeResourceName(k) {
  			volumeLimits[k] = v
  		}
  	}
  	return volumeLimits
  }
docs: // VolumeLimits returns volume limits associated with the node