"allowVolumeExpansion": "allowVolumeExpansion shows whether the storage class allow volume expand",

  // e.g. ["ro", "soft"]. Not validated -
  // mount of the PVs will simply fail if one is invalid.
  // +optional
  repeated string mountOptions = 5;

  // allowVolumeExpansion shows whether the storage class allow volume expand.
  // +optional
  optional bool allowVolumeExpansion = 6;

  // volumeBindingMode indicates how PersistentVolumeClaims should be
  // provisioned and bound.  When unset, VolumeBindingImmediate is used.

  // e.g. ["ro", "soft"]. Not validated -
  // mount of the PVs will simply fail if one is invalid.
  // +optional
  repeated string mountOptions = 5;

  // allowVolumeExpansion shows whether the storage class allow volume expand
  // +optional
  optional bool allowVolumeExpansion = 6;

  // volumeBindingMode indicates how PersistentVolumeClaims should be
  // provisioned and bound.  When unset, VolumeBindingImmediate is used.

	// PersistentVolumes of this storage class are created with
	// +optional
	MountOptions []string

	// AllowVolumeExpansion shows whether the storage class allow volume expand
	// If the field is nil or not set, it would amount to expansion disabled
	// for all PVs created from this storageclass.
	// +optional
	AllowVolumeExpansion *bool

	// VolumeBindingMode indicates how PersistentVolumeClaims should be