// that all host paths may be used.
  // +optional
  repeated AllowedHostPath allowedHostPaths = 17;

  // allowedFlexVolumes is an allowlist of Flexvolumes.  Empty or nil indicates that all
  // Flexvolumes may be used.  This parameter is effective only when the usage of the Flexvolumes
  // is allowed in the "volumes" field.
  // +optional
  repeated AllowedFlexVolume allowedFlexVolumes = 18;

* Dynamic Flexvolume plugin discovery. Flexvolume plugins can now be discovered on the fly rather than only at system initialization time. ([#50031](https://github.com/kubernetes/kubernetes/pull/50031), [@verult](https://github.com/verult))

  // +optional
  optional FlockerVolumeSource flocker = 11;

  // flexVolume represents a generic volume resource that is
  // provisioned/attached using an exec based plugin.
  // +optional
  optional FlexPersistentVolumeSource flexVolume = 12;

  // azureFile represents an Azure File Service mount on the host and bind mount to the pod.
  // +optional