protected function internalNodePath( $virtualFolder, $collection )
    {
        // All root nodes needs to prepend their name to get the correct path
        // except for the content root which uses the path directly.
        if ( $virtualFolder === self::virtualMediaFolderName() )
        {
            $nodePath = 'media';
            if ( strlen( $collection ) > 0 )
            {
                $nodePath .= '/' . $collection;
            }
        }
        else
        {
            $nodePath = $collection;
        }
        return $nodePath;
    }