API reference: https://api.immobilienscout24.de/api-docs/import-export/ontop-placement/overview/
$otPlacement = new OnTopPlacement();
$otPlacement->getAll();
// placement is "showcaseplacement" (OnTopPlacement::SHOW_CASE) by default
// but you can change that of course!
$otPlacement->setPlacement(OnTopPlacement::PREMIUM);
$otPlacement->setPlacement(OnTopPlacement::TOP);
$otPlacement->getOneById(int $id);