$parameters['extensionsDir'] = CRM_Utils_Array::value('extensionsDir', $parameters, $config->extensionsDir);
$parameters['extensionsURL'] = CRM_Utils_Array::value('extensionsURL', $parameters, $config->extensionsURL);
$parameters['resourceBase'] = CRM_Utils_Array::value('resourceBase', $parameters, $config->resourceBase);
$parameters['extensionsDir'] = CRM_Utils_Array::value('extensionsDir', $parameters, $config->extensionsDir);
$parameters['extensionsURL'] = CRM_Utils_Array::value('extensionsURL', $parameters, $config->extensionsURL);
$parameters['resourceBase'] = CRM_Utils_Array::value('resourceBase', $parameters, $config->resourceBase);