Change Font size button with ControlP5

Hello guys,

How can I change the size of the font (or type) on a button, using controlP5?

I would like to do something similar as it is in this post, but it seems that the library has been updated, no longer works in this way.

https://forum.processing.org/one/topic/control-p5-changing-mouseover-color-font-size-font.html

Thanks for attention.