// +optional
  optional string cachingMode = 3;

  // fsType is Filesystem type to mount.
  // Must be a filesystem type supported by the host operating system.
  // Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
  // +optional
  optional string fsType = 4;

  // readOnly Defaults to false (read/write). ReadOnly here will force

  // to determine if Kubernetes should modify ownership and permissions of the volume.
  // With the default policy the defined fsGroup will only be applied
  // if a fstype is defined and the volume's access mode contains ReadWriteOnce.
  //
  // +optional
  optional string fsGroupPolicy = 5;

  // tokenRequests indicates the CSI driver needs pods' service account

  // to determine if Kubernetes should modify ownership and permissions of the volume.
  // With the default policy the defined fsGroup will only be applied
  // if a fstype is defined and the volume's access mode contains ReadWriteOnce.
  //
  // +optional
  optional string fsGroupPolicy = 5;

  // tokenRequests indicates the CSI driver needs pods' service account

* `kubectl drain` no longer spins trying to delete pods that do not exist ([#49444](https://github.com/kubernetes/kubernetes/pull/49444), [@eparis](https://github.com/eparis))
* Support specifying of FSType in StorageClass ([#45345](https://github.com/kubernetes/kubernetes/pull/45345), [@codablock](https://github.com/codablock))