// This volume finds the bound PV and mounts that volume for the pod. A
// PersistentVolumeClaimVolumeSource is, essentially, a wrapper around another
// type of volume that is owned by someone else (the system).
message PersistentVolumeClaimVolumeSource {
  // claimName is the name of a PersistentVolumeClaim in the same namespace as the pod using this volume.