I'm wondering if there is a correct way to combine multiple reports.
I couldn't find anything in the documentation and examples, but maybe
I just didn't look in the right place.

I'm using Ruport with Rails and have an app/reports directory that
contains two reports, Foo and Bar.  Each has two or three stages.
What I want to do is create a third report, (let's call it Combo) and
have it generate a single report combining selected stages from Foo
and Bar.  I envision something like this:

class ComboReport < Ruport::Controller

  stage Foo::stage1, Foo::stage2, Bar::stage1  # I doubt this would be
the right syntax, but you get the idea

# ...

end

Is there a built-in or best way to do this?