How is the AddOnManager control used?

[Dio]

Reference: http://wiki.esoui.com/Controls#AddOnManager

I can't figure out how to access this. It's listed as a control but I don't see any ControlType for it, and I'm not sure how to use its methods. Anyone have example code?

For example I want to get the number of AddOns. I thought maybe ZO_AddOnManager was an AddOnManager control, but that does not seem to be.

e.g. ZO_AddOnManager:GetNumAddOns() <-- Invalid