Honestly, this is the only proof I'm willing to accept for the survival of any low-revenue service that Google provides! But still, google code didn't live.

Google wasn't using Google Code.

Perhaps they meant Google Code Search?

Yeah, Code Search is a counterexample because Google was using it, but killed the public version to focus on internal use. Though it is still available to the public in limited form for Google's major open source projects as https://source.chromium.org/ and https://cs.android.com/

This.