1.15.2 set/getData and alternatives?

I am attempting to use "setData" and "getData"

Under Setdata I get:

Code (Java):

Example codeline:
Bukkit.getScheduler().runTaskLater((Plugin)getInstance(), () -> hit.setData((byte)this.lastface), 20L);

"The method setData(byte) is undefined for the type Block"

getData:

Code (Java):

Example codeline:
Button button = (Button)state.getData();

"The method getData() is undefined for the type BlockState"

Is there somewhere I can educate myself on what I can adapt these to?