def AddClusterVersionFlag(parser, suppressed=False, help=None):  # pylint: disable=redefined-builtin
  """Adds a --cluster-version flag to the given parser."""
  if help is None:
    help = """\
The Kubernetes version to use for the master and nodes. Defaults to
server-specified.

The default Kubernetes version is available using the following command.

  $ gcloud container get-server-config
"""

  return parser.add_argument('--cluster-version', help=help, hidden=suppressed)