protected static function _convertManifestVer1_0($manifestVehicles) {
        $manifest = array();
        foreach ($manifestVehicles as $vClass => $vehicles) {
            foreach ($vehicles as $vKey => $vehicle) {
                $entry = array(
                    'class' => $vClass,
                    'native_key' => $vehicle['native_key'],
                    'filename' => $vehicle['filename'],
                );
                if (isset($vehicle['namespace'])) {
                    $entry['namespace'] = $vehicle['namespace'];
                }
                $manifest[] = $entry;
            }
        }
        return $manifest;
    }