PriceCollection::findByGroupId

public function findByGroupId(int $groupId): ?BasePrice
{
	/** @var BitrixCatalogv2PriceBasePrice $price */
	foreach ($this->getIterator() as $price)
	{
		if ($price->getGroupId() === $groupId)
		{
			return $price;
		}
	}

	return null;
}