protected function isManagedStock(Mage_CatalogInventory_Model_Stock_Item $stock)
    {
        return (
            ($this->_config->isBackorderable || (int) $stock->getBackorders() === Mage_CatalogInventory_Model_Stock::BACKORDERS_NO)
            && $stock->getManageStock() > 0
        );
    }
protected function isManagedStock(Mage_CatalogInventory_Model_Stock_Item $stock)
    {
        return (
            ($this->_config->isBackorderable || (int) $stock->getBackorders() === Mage_CatalogInventory_Model_Stock::BACKORDERS_NO)
            && $stock->getManageStock() > 0
        );
    }
protected function isManagedStock ( Mage_CatalogInventory_Model_Stock_Item $ stock ) { return ( ( $ this -> _config -> isBackorderable || ( int ) $ stock -> getBackorders ( ) === Mage_CatalogInventory_Model_Stock :: BACKORDERS_NO ) && $ stock -> getManageStock ( ) > 0 ) ; }
If the inventory configuration allow order item to be backorderable simply check if the
Manage stock for the item is greater than zero. Otherwise, if the inventory configuration
do not allow order items to be backorderable, then ensure the item is not backorder and has
manage stock.

@param  Mage_CatalogInventory_Model_Stock_Item
@return bool
If the inventory configuration allow order item to be backorderable simply check if the Manage stock for the item is greater than zero . Otherwise if the inventory configuration do not allow order items to be backorderable then ensure the item is not backorder and has manage stock .