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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 vrrp_shutdown(app, instance_name):
 """shutdown the instance. """

    shutdown_request = vrrp_event.EventVRRPShutdownRequest(instance_name)
    app.send_event(vrrp_event.VRRP_MANAGER_NAME, shutdown_request)