$productList->reduceStock()
Lowers the stock of every product in the list by the quantity ordered
$productList->reduceStock(): Wagnerwagner\Merx\ProductListReturn type
Description
Called by Merx::createOrder() once an order is written, while
wagnerwagner.merx.reduceStock is true. The order exists by then, so a
product which cannot be updated is logged and skipped rather than failing
the order.