[Rails] include ActionView::Helpers in Rails 3?

How do you do the equivalent of:

module MyLibrary
include ActionView::Helpers::AssetTagHelper
end

...in Rails 3?

I'm trying to upgrade my app from 2.3.9 to 3.0.1 and I have some stuff
in /lib that needs to include these helpers from ActionView. It works
fine in 2.3.x, but in 3.x it's giving me the error:

undefined local variable or method `config'

One of the methods in AssetTagHelper now tries to access
controller.config.perform_caching, but since no controller exists in
my library, it flips out. Any way around this?

Thanks!
Marc

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