protected function _escapeTrace($Trace)
    {
        if (!$Trace) return $Trace;
        for( $i=0 ; $i<sizeof($Trace) ; $i++ ) {
            if (isset($Trace[$i]['file'])) {
                $Trace[$i]['file'] = $this->_escapeTraceFile($Trace[$i]['file']);
            }
            if (isset($Trace[$i]['args'])) {
                $Trace[$i]['args'] = $this->encodeObject($Trace[$i]['args']);
            }
        }
        return $Trace;    
    }