add: var folderTree = GetFolderTree();   if (folderTree.view.isContainerOpen(index)) return;  var folderResource = GetFolderResource(folderTree, index);  if (folderTree.view.getLevel(index) == 0) {   folderResource.QueryInterface(Components.interfaces.nsIMsgFolder) .server.performExpand(msgWindow); } else if (folderResource instanceof Components.interfaces.nsIMsgImapMailFolder) {   folderResource.performExpand(msgWindow); } 
context:     onToggleOpenState: function()    {    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/f13a4abe17586f3b8e4d8891a16d8dc330756fab/msgMail3PaneWindow.js/clean/mailnews/base/resources/content/msgMail3PaneWindow.js