code: func LinkSetVfNodeGUID(link Link, vf int, nodeguid net.HardwareAddr) error {
  	return pkgHandle.LinkSetVfGUID(link, vf, nodeguid, nl.IFLA_VF_IB_NODE_GUID)
  }
docs: // LinkSetVfNodeGUID sets the node GUID of a vf for the link.
  // Equivalent to: `ip link set dev $link vf $vf node_guid $nodeguid`