/**
* singleton function used to manage this object
*
* @param string $mode
* The mode of operation: live or test
*
* @return object
* @static
*/
static function &singleton($mode, $component, &$paymentProcessor)
{
if (self::$_singleton === NULL) {
self::$_singleton = new self($mode, $paymentProcessor);
}
return self::$_singleton;
}
