add: } else if(command == "MarkMessageRead" || command == "MarkMessageFlagged" || command == "MarkThreadAsRead") { var threadTree = GetThreadTree(); return threadTree.database; 
context: function GetCompositeDataSource(command){	if(command == "GetNewMessages" || command == "Copy" || command == "NewFolder")	{		var folderTree = GetFolderTree();		return folderTree.database;	}	return null;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/1e6f1a5f0746d8d8e68b372ddba5e3fdb86ba1a5/msgMail3PaneWindow.js/clean/mailnews/base/resources/content/msgMail3PaneWindow.js