What is the Integrator, and where has it gone?

I’m following a video tutorial that references Integrator settings in Cycles.
But this collapse/expand section called “Integrator” is not visible for me in 2.70
So I am wondering if this is a feature that has since been removed, or maybe “integrated” in some other way?

Here’s what I’m not seeing:

The Blender 2.6 wiki documentation tells about it, but doesn’t explain why it’s not there in 2.7.

“Light Paths”

Thank you Bartek!
With just two words you’ve shown me the light.

Bartek knows all. :wink:
By the way, what skin/theme are you using?

I think “Back to black” the one that’s standard in Blender.

Oh, okay. I’ll check it out.