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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def order_stop(backend, order_id):
 """ Stop an order - Turn off the serving generation ability of an order. Stop any running jobs. Keep all state around. """

    if order_id is None:
        raise click.ClickException('invalid order id %s' % order_id)
    click.secho('%s - Stop order id %s' % (get_datetime(), order_id), fg='green')
    check_and_print(DKCloudCommandRunner.stop_order(backend.dki, order_id))