/**
* Returns a StockManager
*
* @return StockManagerInterface
*/
public static function getManager()
{
if (!isset(StockManagerFactory::$stock_manager)) {
$stock_manager = StockManagerFactory::execHookStockManagerFactory();
if (!$stock_manager instanceof StockManagerInterface) {
$stock_manager = new StockManager();
}
StockManagerFactory::$stock_manager = $stock_manager;
}
return StockManagerFactory::$stock_manager;
}