Is there a way to call a Blizzard widget script securely?

[Mayron]

I am not sure if Blizzard added support for this over the years and I missed it but is it possible to get a blizzard frame, replace a script (such as OnDragStart, for example) with a custom script but then after executing the old script in a secure way? Some Blizzard frame scripts will cause a taint error if you do this and it would be nice to be able to do this in a secure way.

I remember that this used to be a big problem and not been up to date with the latest API changes.