something like modules in orchard project

As you know, in ASP.NET MVC you can use Areas to categories your application and make it easy to manage and organize your logic.Say if I have controller named "Teams" and action named "Create", which is located in "Fun" Area, then I can request the action as follow:

http://myapplication.com/fun/teams/create

This is very nice feature, But it does not allow nested Areas. In fact I want开发者_开发知识库 to know how orchard project used it modules like areas.Interesting point is that almost every module has it own route handling class.

How All these have been implemented ?