rem: data = data.QueryInterface( Components.interfaces.nsISupportsWString); 
add: data = data.QueryInterface( Components.interfaces.nsISupportsString); 
context: function FetchSampleData(){  if (!top.addInterface)    return( false);  var num = top.recordNum - 1;  if (num < 0)    num = 0;  var data = top.addInterface.GetData( "sampleData-"+num);  var result = false;  if (data != null) {    data = data.QueryInterface( Components.interfaces.nsISupportsWString);    if (data != null) {      ShowSampleData( data.data);      result = true;    }  }  return( result);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/f7ad4265ef6a40ea01c54009718ef28974e67fe9/fieldMapImport.js/clean/mailnews/import/resources/content/fieldMapImport.js