CAllIBlockSection::isExistsMnemonicCode

public function isExistsMnemonicCode(string $code, ?int $sectionId, int $iblockId): bool
{
	if ($code === '')
	{
		return false;
	}
	$filter = [
		'=IBLOCK_ID' => $iblockId,
		'=CODE' => $code,
	];
	if ($sectionId !== null)
	{
		$filter['!=ID'] = $sectionId;
	}

	$row = IblockSectionTable::getList([
		'select' => ['ID'],
		'filter' => $filter,
		'limit' => 1,
	])->fetch();

	return !empty($row);
}