SetParametersGroupChild::appendSystemFieldItems

private function appendSystemFieldItems(array $items): array
{
	$options = [
		'ENTITY_ID' => '',
		'IBLOCK_ID' => $this->getIblockId(),
	];

	$productGroupAction = new class($options) extends ProductGroupAction
	{
		public function getFormRowFieldName(string $field): string
		{
			return $field;
		}
	};

	$systemFieldsItems = SystemField::getGroupActions($productGroupAction);
	if (!empty($systemFieldsItems))
	{
		array_push($items, ...$systemFieldsItems);
	}

	return $items;
}