StoreAmount::getMeasure

public function getMeasure(?int $measureId): string
{
	if ($measureId === null)
	{
		return $this->getDefaultMeasure()['SYMBOL'];
	}

	if (!isset($this->measures[$measureId]))
	{
		$measure = CCatalogMeasure::getList([], ['=ID' => $measureId])->Fetch();

		if ($measure)
		{
			$this->measures[$measureId] = $measure['SYMBOL'];
		}
		else
		{
			$this->measures[$measureId] = '';
		}
	}

	return $this->measures[$measureId];
}