ProductGrid::createFilter

protected function createFilter(): ?Filter
{
	if (!$this->useFilter)
	{
		return null;
	}

	$settings = new BitrixCatalogFilterDataProviderSettingsProductSettings([
		'ID' => $this->getId(),
		'IBLOCK_ID' => $this->getSettings()->getIblockId(),
		'VARIATION_IBLOCK_ID' => $this->getSettings()->getOffersIblockId(),
		'LINK_PROPERTY_ID' => $this->getSettings()->getSkuPropertyId(),
		//'SHOW_SECTIONS' => true,
		//'SHOW_XML_ID' => true,
	]);

	return (new ProductFilterFactory)->createBySettings($settings);
}