code: def add_arguments(self, parser):
          
          parser.add_argument(
              '--dry-run',
              action='store_true',
              default=False,
              help="Output what we're going to do, but don't actually do it."
          )
          parser.add_argument(
              '--task-name', '-t',
              default=None,
              help=u"Restrict cleanup to tasks matching the named task.",
          )
          parser.add_argument(
              '--age', '-a',
              type=int,
              default=30,
              help=u"Only delete tasks that have been resolved for at least the specified number of days (default: 30)",
          )
docs: Add arguments to the command parser.
  
          Uses argparse syntax.  See documentation at
          https://docs.python.org/3/library/argparse.html.