[Vala] How I do dump elements in global namespace?

[san hoi <hoisan49 gmail com>]

Hi.

When I read vala-tutorial, I find fellowing sentense.

http://live.gnome.org/Vala/Tutorial#Namespaces
> If you have to reference the global namespace explicitly due to ambiguity
> you can do that with the global:: prefix.

I often use globals() in python. How I can enumerate its in vala?

Thanks.