PistonPreEvent

Fires before the piston has updated block states.

It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.

ZenScript
 Copy
import crafttweaker.api.event.block.piston.PistonPreEvent;

PistonPreEvent extends PistonEvent. That means all methods available in PistonEvent are also available in PistonPreEvent