Flex4 中获取 FlashVars方式传递的参数

Working with flashvars in FlashBuilder4(flex4)
Before flex4,  to get the flashvars, you should do following:

var params:Object = Application.application.parameters; 
var title = params.title; 
var params:Object = Application.application.parameters; var _titlebar = params.title; 

But in flex4:

var params:Object = FlexGlobals.topLevelApplication.parameters; 
var title = params.title;