I want to control boil with a smart bone.

[okubo]

Is it possible to control the boil expression of a line across multiple layers with a single smart bone?

I saw @casvdp using it and would like to make it work.
(00:30~ You can see the “boil” bone in the upper right corner that I'm trying to control with it)
https://youtu.be/43_i6-6D70E?si=zhOZg_12H9SVONgC&t=30

When I try to create an action, I can't figure out how to keyframe the boil and it doesn't work.

If anyone knows how to do this, please let me know.

Sorry if the translation is wrong.