PrePistonEvent

The event is not cancelable.

The event does not have a result.

Importing the class

Importing the class is recommended for events, simply add this line to the top of your script file.

import crafttweaker.forge.api.event.block.piston.PrePistonEvent;

Supertype

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

Listening to the event

events.register<crafttweaker.forge.api.event.block.piston.PrePistonEvent>(event => {
    println("PrePistonEvent ran!");
});