sub = ret.add_subparsers(title="subaction", dest="subaction")
sub.add_parser("start", help="start container")
sub.add_parser("stop", help="start container")
+ sub.add_parser("restart", help="restart container")
sub.add_parser("freeze", help="freeze container")
sub.add_parser("unfreeze", help="unfreeze container")
return ret