ReserveQuantityCollection::getQuantityByStoreId

public function getQuantityByStoreId(int $storeId) : float
{
	$quantity = 0;

	/** @var ReserveQuantity $reservation */
	foreach ($this->collection as $reservation)
	{
		if ($reservation->getStoreId() === $storeId)
		{
			$quantity += $reservation->getQuantity();
		}
	}

	return $quantity;
}