def METHOD_NAME(item_status):
    """Get mapped item status.
    :param item_status: Item circulation status
    :return: sip2 circulation status
             (see invenio_sip2.models.SelfcheckCirculationStatus)
    """
    circulation_status = {
        ItemStatus.ON_SHELF: 'AVAILABLE',
        ItemStatus.AT_DESK: 'WAITING_ON_HOLD_SHELF',
        ItemStatus.ON_LOAN: 'CHARGED',
        ItemStatus.IN_TRANSIT: 'IN_TRANSIT',
        ItemStatus.EXCLUDED: 'OTHER',
        ItemStatus.MISSING: 'MISSING',
    }
    return circulation_status.get(item_status, 'OTHER')