/**
* Get an authorization object
*
* Returns a reference to the global {@link JAuthorization} object, only creating it
* if it doesn't already exist.
*
* @access public
* @return object JAuthorization
*/
function &getACL()
{
static $instance;
if (!is_object($instance)) {
$instance = JFactory::_createACL();
}
return $instance;
}