''

@staticmethod
def cr_shelter_service_multirepresent(shelter_service_ids):

    if (not shelter_service_ids):
        return current.messages['NONE']
    db = current.db
    table = db.cr_shelter_service
    if isinstance(shelter_service_ids, (list, tuple)):
        query = table.id.belongs(shelter_service_ids)
        shelter_services = db(query).select(table.name)
        return ',    '.join([s.name for s in shelter_services])
    else:
        query = (table.id == shelter_service_ids)
        shelter_service = db(query).select(table.name, limitby=(0, 1)).first()
        try:
            return shelter_service.name
        except:
            return current.messages.UNKNOWN_OPT
