protected function _canSubtractQty(
        \Magento\CatalogInventory\Api\Data\StockItemInterface $stockItem
    ) {
        $result = $stockItem->getManageStock() && $this->configStock->canSubtractQty();
        return $result;
    }
protected function _canSubtractQty(
        \Magento\CatalogInventory\Api\Data\StockItemInterface $stockItem
    ) {
        $result = $stockItem->getManageStock() && $this->configStock->canSubtractQty();
        return $result;
    }
protected function _canSubtractQty ( \ Magento \ CatalogInventory \ Api \ Data \ StockItemInterface $ stockItem ) { $ result = $ stockItem -> getManageStock ( ) && $ this -> configStock -> canSubtractQty ( ) ; return $ result ; }
Check if is possible subtract value from item qty

@param \Magento\CatalogInventory\Api\Data\StockItemInterface $stockItem
@return bool
Check if is possible subtract value from item qty