I want to use a GCV with User App URL, Username, Named Password, etc in
the Integration activity, since I need to have at least three PRD's
(Create Role, Modify Role, Remove Role) and I have to stage them through
lab, dev, qa, prod. I do NOT want to have to go change 3 fields in each
PRD per environment. What a PITA!

I figured I would just use a GCV, now that GCV's are available in UA 4.

But no GCV selector in the ECMA editor.

Does that mean it is not supported, or does it mean that the UI is
missing it? Anyone know?