Base::listAction

public function listAction(PageNavigation $pageNavigation, array $select = [], array $filter = [], array $order = []): ?Page
{
	/** @var BitrixCatalogRestViewProduct $view */
	$view = $this->getViewManager()->getView($this);
	$r = $view->isAllowedProductTypeByIBlockId(static::TYPE, $filter['IBLOCK_ID']);
	if (!$r->isSuccess())
	{
		$this->addErrors($r->getErrors());

		return null;
	}

	$list = $this->getAllowedProductTypes();

	if (isset($filter['TYPE']))
	{
		$filter['TYPE']  = in_array($filter['TYPE'], $list, true) ? $filter['TYPE'] : $list;
	}
	else
	{
		$filter['TYPE'] = $list;
	}

	return parent::listAction($pageNavigation, $select, $filter, $order);
}