The event is not cancelable.

The event does not have a result.

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

ZenScript
 Copy
import crafttweaker.neoforge.api.event.block.piston.PrePistonEvent;

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

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

PrePistonEvent implements the following interfaces. That means all methods defined in these interfaces are also available in PrePistonEvent

• ICancellableEvent