[Closed] "Wireable" rollout?

TL;DR: How can I automatically update rollout (or any kind of interface) values when I change a variable?

I’m writing a simple autorigger and was thinking about a “motionbuildesque character window”, where you can select controls, set keys, change the ik/fk parameters, and so on. I have the basics set up for the creation of limbs, but… what kind of rollout or plugin do I use to create a window (or dockable window, or utility, or whatever) where I can change, for example, an FKIK value in another place of the interface (a custom attribute on a dumy) and have the equivalent value be updated automatically on this rollout window?

I could create a rollout and have an update button, but I don’t like the idea much…