code: func PersistentVolumeToSelectableFields(persistentvolume *api.PersistentVolume) fields.Set {
  	objectMetaFieldsSet := generic.ObjectMetaFieldsSet(&persistentvolume.ObjectMeta, false)
  	specificFieldsSet := fields.Set{
  		// This is a bug, but we need to support it for backward compatibility.
  		"name": persistentvolume.Name,
  	}
  	return generic.MergeFieldsSets(objectMetaFieldsSet, specificFieldsSet)
  }
docs: // PersistentVolumeToSelectableFields returns a field set that represents the object