rem: doCommand: function (aCommand) 
add: doCommand: function(aCommand) 
context:   doCommand: function (aCommand)  {    if (this.isCommandEnabled(aCommand))      this.commands[aCommand](gDownloadsView.selectedItem);  },  
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/43455f9fc69a7b8e33dae13cc90fd333fc5448d2/downloads.js/buggy/toolkit/mozapps/downloads/content/downloads.js