Making a property available to nested components

[Toby Hobson]

Hi

I am looking to achieve something similar to the way in which JSP custom tags 
work - I would like to make a property of a component available to nested 
components/markup e.g.

TestPage.tml:
<t:container value="container">
    hello ${container.user.name}
</t:container>

Container {
  @Property
  User user;

  @PageAttached()
  void attach() {
  ... load and process "user"
  }
}

But i can't find a way to do this. I know it can be done because the loop 
component works like this.

Does anyone have any ideas?

Thanks

Toby