rem: if (!interfaceRequestor) continue;  
context: function GetEditorController(){  var numControllers = window._content.controllers.getControllerCount();      // count down to find a controller that supplies a nsIControllerCommandManager interface  for (var i = numControllers-1; i >= 0 ; i --)  {    var commandManager = null;        try {       var controller = window._content.controllers.getControllerAt(i);            var interfaceRequestor = controller.QueryInterface(Components.interfaces.nsIInterfaceRequestor);      if (!interfaceRequestor) continue;          commandManager = interfaceRequestor.getInterface(Components.interfaces.nsIControllerCommandManager);    }    catch(ex)    {        //dump(ex + "\n");    }    if (commandManager)      return commandManager;  }  dump("Failed to find a controller to register commands with\n");  return null;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/d56262a401c9d60bbef8fdbf3317ef55705279f1/ComposerCommands.js/clean/editor/ui/composer/content/ComposerCommands.js