@staticmethod
def setup_subparser(parser, cmd=None):
    """
        Set up a subparser for 'config'
        """
    parser.add_argument('pkg', nargs='?', help=
        'Package for configuration key to query or set')
    parser.add_argument('value', nargs='?', help='New value')
    parser.add_argument('-k', '--key', help=
        'Set or query this key instead of the install state')
