icingaweb2-module-director/library/Director/Objects/IcingaScheduledDowntimeRanges.php

<?php

namespace Icinga\Module\Director\Objects;

use Countable;
use Iterator;
use Icinga\Module\Director\IcingaConfig\IcingaConfigRenderer;

class IcingaScheduledDowntimeRanges extends IcingaRanges implements Iterator, Countable, IcingaConfigRenderer
{
    protected $rangeClass = IcingaScheduledDowntimeRange::class;
    protected $objectIdColumn = 'scheduled_downtime_id';

    public function toLegacyConfigString()
    {
        return '';
    }
}