/**
* singleton function used to manage this object
*
* @return object
* @static
*
*/
static function &singleton()
{
if (self::$_singleton === null) {
$config = CRM_Core_Config::singleton();
$classPath = str_replace('_', '/', $config->smsClass) . '.php';
require_once $classPath;
self::$_singleton = eval('return ' . $config->smsClass . '::singleton( $mode );');
}
return self::$_singleton;
}
