rem:  widget = GetThreadTree(); if ( widget ) widget.controllers.appendController(ThreadPaneController);  
context: function SetupCommandUpdateHandlers(){	var widget;		// folder pane	widget = GetFolderTree();	if ( widget )		widget.controllers.appendController(FolderPaneController);		// thread pane	widget = GetThreadTree();	if ( widget )        widget.controllers.appendController(ThreadPaneController);			top.controllers.insertControllerAt(0, DefaultController);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/68b2bf0c677dd0625902cafde19d7fadf8ba3fba/mail3PaneWindowCommands.js/clean/mailnews/base/resources/content/mail3PaneWindowCommands.js