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

<?php

namespace Icinga\Module\Director\Objects;

class IcingaZone extends IcingaObject
{
    protected $table = 'icinga_zone';

    protected $defaultProperties = array(
        'id'             => null,
        'object_name'    => null,
        'object_type'    => null,
        'parent_zone_id' => null,
    );

    protected function renderParent_zone_id()
    {
        return $this->renderZoneProperty($this->parent_zone_id, 'parent_zone');
    }
}