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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 _secret_event_lifecycle_cb(conn, secret, event, detail, opaque):
    '''
    Secret lifecycle events handler
    '''
    _salt_send_event(opaque, conn, {
        'secret': {
            'uuid': secret.UUIDString()
        },
        'event': _get_libvirt_enum_string('VIR_SECRET_EVENT_', event),
        'detail': 'unknown'  # currently unused
    })