rem: doCommand: function (aCommand) 
add: doCommand: function(aCommand) 
context:   doCommand: function (aCommand)  {    if (this.isCommandEnabled(aCommand))      this.commands[aCommand](gDownloadsView.selectedItem);  },  
meta: 10520	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10520/c816c402c2dc9a4ba3e0172325a9186da0704138/downloads.js/buggy/toolkit/mozapps/downloads/content/downloads.js