message ResourceHandle {
  // DriverName specifies the name of the resource driver whose kubelet
  // plugin should be invoked to process this ResourceHandle's data once it
  // lands on a node. This may differ from the DriverName set in
  // ResourceClaimStatus this ResourceHandle is embedded in.
  optional string driverName = 1;

- Dynamic Resource Allocation (DRA): client-side validation of a ResourceHandle would have accepted a missing DriverName, whereas server-side validation then would have raised an error. ([#124075](https://github.com/kubernetes/kubernetes/pull/124075), [@pohly](https://github.com/pohly))