static function serverCallHelper( $strServerCall )
    {
        $server = ezjscServerRouter::getInstance( $strServerCall );
        if ( !$server instanceof ezjscServerRouter )
        {
            eZDebug::writeError( 'Not a valid ezjscServer function: ' . implode( '::', $strServerCall ), __METHOD__ );
            return null;
        }
        // Make sure the function is present on the class
        if ( !$server->hasFunction() )
        {
            eZDebug::writeError( 'Could not find function: ' . $server->getName() . '()', __METHOD__ );
            return null;
        }
        return $server;
    }